What you can learn from this article
- First of all, what is GSTV? Reasons for increasing popularity in the used market
- The reason why the "rare stones" handled by GSTV do not easily fall in value even when used
- Three places and characteristics where you can buy second-hand GSTV jewelry
- [Comparison table] Where is the correct place to buy by purchase channel?
- 7 points to check before buying a used GSTV
- 3 popular stones from GSTV that are particularly popular for second-hand items
- How much cheaper is a used GSTV than a new one?
- Summary｜Conclusion: Buy used GSTV at a specialty store
First of all, what is GSTV?
Reasons for increasing popularity in the used market
GSTVis familiar from BS-TBS “Beautiful Jewelry Shopping”Japan's only shopping channel specializing in jewelryIt is. We sell high-quality jewelry polished in Idar-Oberstein, Germany, as well as original pieces made from rare natural stones, live every day.
New sales price is per itemTens of thousands of yen to several million yen. Among fans and viewers of the show, there is a deep-rooted need to ``I want to get the series I missed out on back then'' and ``I want the same design at a cheaper price.'' This is why the used GSTV market is booming.
💎 How GSTV jewelry is distributed in the second-hand market
*GSTV official only sells new products. Used products are not sold at official stores.
"Rare stones" handled by GSTV
The reason why the price does not easily drop even when used
All of the gemstones that GSTV specializes in areA rare stone whose production is extremely limited.It is.
🌍 “Output × Demand” mapping of rare stones
*The position of the circle is a conceptual image. In some cases, the market price of a used item is higher than that of a new item.
💡 Points:Demand for these rare stones is increasing worldwide.There are even cases where the used market price is higher than when it was new.It is characterized by That's why when you buy a used item, it's not just cheap.Perspectives to choose based on “correct appraisal and price”is essential.
✨ Selby's GSTV Used Collection
Rare stones such as Paraiba tourmaline and tanzanite
Available as certified and brand new.
You can buy second-hand GSTV jewelry
3 locations and features
GSTV officialNew sales onlyThe official store does not sell any second-hand items. So where can you buy second-hand items? big3 purchasing channelsThere is.
① Official reuse service
A reuse site operated by or affiliated with a brand. There is a sense of security in dealing with used products originating from that brand.
② Flea market app/auction
Mainly personal listings such as Mercari and Yahoo! Auctions. You can aim for the lowest price, but it is up to the seller to determine the authenticity.
③ Jewelry specialty shop
Authenticity determination by a professional appraiser + new finish + return guarantee are provided in one set.
① Official reuse service
In recent years, there has been an increase in the number of jewelry brands operating used jewelry resale services either by themselves or through partnerships. The ``intermediary type'' is common, where used items entrusted to us by customers are cleaned, then listed and sold.
✅ Benefits:You can be sure that the product is from the brand, giving you a sense of security.
⚠️ Points to note:As this is an intermediary item, inventory fluctuates rapidly, and popular items tend to sell out quickly. The structure makes it difficult to respond to price negotiations and immediate shipping.
② Flea market app/auction (Mercari, Yahoo Auctions, etc.)
✅ Benefits:Aim for the lowest price, with a large number of listings
⚠️ Points to note:Authenticity determination is left up to the seller, and many products do not have a certificate of authenticity, and problems such as return fraud have become a social problem. There is also a risk of mixing GSTV-like products and refurbished products.
③ Used/purchase shop specializing in jewelry
✅ Benefits:Comes with a certificate of authenticity and a guarantee, offering the best balance between price and peace of mind.
⚠️ Points to note:Price is higher than private listing (however, appraisal, finishing, warranty)
⚖️ “Price vs. Reliability” matrix by purchase channel
*The location is a conceptual image. The upper right corner indicates where to purchase products that are more affordable and safe.
[Comparison table] By purchase channel
Where is the right place to buy it?
| Item | Official reuse | Flea market app auction | Jewelry specialty shop |
|---|---|---|---|
| price range | Medium | Cheap | Medium to slightly high |
| Authenticity appraisal | Branded items | Depends on the seller | Conducted by a professional appraiser |
| Certificate of authenticity included | Depends on the product | Almost none | Yes (GIA/CGL etc.) |
| New finish | cleaning only | None | Refinishing by craftsmen |
| Return guarantee | limited | No principle | Specify 7 days etc. |
| Inventory stability | Unstable (mediated) | unstable | Stable with in-house inventory |
| Actual confirmation at store | Not possible | Not possible | Possible (physical stores available) |
💡 If you only look at the price, flea market apps look attractive, butRisk of encountering fakes and quality problems with “jewelry worth hundreds of thousands of yen”Considering that,Specialty shops have the highest cost performanceThat's the conclusion.
🔍 Appraised and brand new GSTV jewelry
At Selby, all items come with professional appraisal and return guarantee.
We also accept consultations on LINE.
Before buying a used GSTV
7 points to check
✅ Pre-purchase check flow
- 1 Be sure to check whether there is a certificate of authenticity (GIA/CGL) Especially for expensive stones such as diamonds and paraiba, be sure to check whether they come with a GIA (Gemological Institute of America) or CGL (Central Gemological Laboratory) certificate. If there is no appraisal, the item may be sold at a price significantly higher than its original market value.
- 2 Is it “newly finished”? Jewelry can become scratched and dull over time. The appearance and lifespan of the product will vary greatly depending on whether the product has been given a new finish (re-polished) by a professional craftsman.
- 3 Return guarantee period You cannot check the actual product when purchasing online. The golden rule is to choose a shop that offers a return guarantee of at least 7 days.
- 4 Accuracy of stone type and place of origin Even if it is labeled as "Paraiba tourmaline", its value varies greatly depending on the production area. Because Brazilian products are particularly premium, it is difficult to determine the accuracy of the labeling unless you are at a specialty store.
- 5 Is it possible to change the number? It cannot be used if the ring size does not match. Before you buy, ask if they offer free or low-cost resizing.
- 6 Presence of accessories (warranty card/box) If there is a possibility of selling in the future,"Full set" including box, warranty, and certificate of authenticityBuying at will have a higher resale value.
- 7 Authenticity appraisal system for retailers It is extremely important to have a system in place to determine that GSTV is genuine. Choose a shop that has qualified jewelry specialists.
Especially if it's a used item.
3 popular stones from GSTV
paraiba tourmaline
neon blueOne of the three rare stones in the world.TBS "Matsuko's unknown world"However, it is a popular stone that has been featured. In the used market, when new60〜80%It is traded in small quantities, and rare sizes (0.3ct or more) tend to increase in price.
tanzanite
color change effectBirthstone for December. It has an attractive discoloration effect that changes from blue in natural light to purple in incandescent light. The place of origin isOnly one mine, Merelani mine in Tanzania.. This stone is expected to become rarer in the future due to the depletion of mines.
Cut stone from Idar Oberstein
Meister techniqueFancy cuts made by skilled masters in Germany's jewelery majesty. It cannot be removed by mechanical polishing.unique brillianceIt is characterized by Demand for collectors is stable because the craftsmanship itself has value.
Used GSTV is better than new
How good is it?
Analyzing the current market price, GSTV used products areApproximately 40-70% of the new list priceThere are many cases where you can purchase it.
📊 GSTV used product discount rate image
*Market prices are approximate values as of June 2026. Varies depending on condition and accessories.
| Product example | New regular price guide | Used market price guide | discount rate |
|---|---|---|---|
| K18YG Paraiba tourmaline ring 0.45ct | Approximately 250,000 yen | Approximately 80,000 to 120,000 yen | Approximately 50-68% OFF |
| K18 brown diamond earrings 1.0ct | Approximately 300,000 yen | Approximately 150,000 to 200,000 yen | Approximately 35-50% OFF |
| PT950 diamond ring 0.3ct | Approximately 250,000 yen | Approximately 110,000 to 150,000 yen | Approximately 40-55% OFF |
💡 In other words, even with the same "GSTV",There are many cases where you can save more than 100,000 yen just by changing the way you buy.That's what it means.
Summary｜GSTV used
The conclusion is to buy at a specialty store.
The options when buying used GSTV jewelry are summarized as follows.
However, the risk is your own responsibility. There is a possibility of authenticity and quality problems.
However, inventory is unstable. Popular stones tend to sell out quickly.
The 3-piece set includes a certificate of authenticity, a new finish, and a return guarantee, making it ideal for purchasing jewelry worth hundreds of thousands of yen or more.
selbyAs the Komehei Group's only jewelry specialist company, we offer jewelry derived from GSTV.Authenticity verified, new finish, return guarantee includedIt is handled by. You can check the actual item at a physical store or consult with us on LINE, so you can feel safe even if it is your first time purchasing used jewelry.
🔔 Purchasing is also being strengthened
new storeOkachimachi station storeYaDelivery assessmentare also available.
Also, please check the90% purchase system (limited time campaign)is also in progress.
💎 Acquire used GSTV jewelry "correctly and wisely"
Professionally appraised, brand new, and comes with a return guarantee.
Check out Selby's GSTV collection.