Buy-back and trade-in commitment
Commitment
KBMC buys back and trades in pieces it has sold, whenever the boutique is open, using the formula on this page. Staff cannot change the price; any proposal that departs from the formula must state a reason and be approved by the Store Manager.
Two options
- Buy-back: you sell the piece and receive money.
- Trade-in: you exchange the old piece for a new KBMC piece and its value is deducted from the new price. Trade-in deductions are lower than buy-back.
Metal formula
Metal value = fine-gold weight × 9999 buying price on the current board × (1 − deduction)
| Metal | Buy-back deduction | Trade-in deduction |
|---|---|---|
| 24K gold (999.9) | 0.3% | 0% |
| Karat gold (18K, 14K, 10K) | 2.0% | 1.0% |
| Silver | 5.0% | 3.0% |
Labour is not refunded on buy-back or trade-in.
Stone formula
Stone value = stone price on the original invoice × rate
| Stone | Buy-back rate | Trade-in rate |
|---|---|---|
| Certified natural diamond | 70% | 90% |
| Certified coloured stone | 50% | 70% |
| Laboratory-grown diamond | 0% | 30% |
From the second year after purchase, rates fall by 5 percentage points a year. Chipped stones, stones without their report or with a mismatched laser inscription are re-valued from a new test.
Worked example
An 18K ring in its first year: 3.20 g of metal and a natural diamond listed at 20,000,000 VND. Assume a 9999 buying price of 14,000,000 VND per chỉ.
| Step | Buy-back | Trade-in |
|---|---|---|
| Fine-gold weight | 0.640 chỉ | 0.640 chỉ |
| Metal before deduction | 8,960,000 | 8,960,000 |
| Metal after deduction (2% / 1%) | 8,780,800 | 8,870,400 |
| Diamond (70% / 90%) | 14,000,000 | 18,000,000 |
| You receive | 22,780,800 | 26,870,400 |
Figures illustrate the method only.
Conditions
- The piece was sold by KBMC and keeps its laser code; KBMC retrieves the record from the code. No paper invoice is needed.
- The seller shows valid photo ID. This is mandatory for every buy-back.
- The piece is weighed and purity-tested in front of you; results are printed on the buy-back slip.
- Payments of 5 million VND or more per person per day are made by transfer to an account in the seller's name.
- Transactions of 100 million VND or more are approved on the spot by the Store Manager.
Limit on diamonds
The total KBMC pays out for diamond buy-backs each month is capped. When the monthly cap is used up, KBMC offers an immediate trade-in or a signed payment schedule with a fixed date. The cap is disclosed in advance so it never comes as a surprise.
Pieces from other brands
KBMC buys other brands' gold by measured purity and actual weight, applying the karat-gold deduction. Stones on such pieces are valued only with a matching grading report.