| Factor | What to Look For | Why It Counts |
| Buyer standing | Trading history, verifiable premises, independent reviews | Protects against unfair valuations |
| Documentation | A current certificate that matches the stone | Narrows the buyer’s margin for doubt |
| Valuation drivers | Diamond grade, metal purity, wear on the setting | Determines the realistic resale value |
| Offer structure | Deductions, testing charges, payment terms | Reveals the true net figure |
| Promotional terms | Expiry dates, eligibility rules, percentage bonuses | Can disguise a weaker base offer |