It depends on the sale method. For silver bought by weight (solid silver headed for melting), cleaning does not change the metal value: it is pointless, even risky. For a piece sold second-hand, a clean presentation can help, but never over-clean.
When solid silver is destined for a buyback by weight, the buyer estimates the value from the fine weight multiplied by the day's price, not from appearance. Patina, tarnish or oxidation marks do not enter this calculation: cleaning therefore adds no value.
Worse, unsuitable cleaning can be risky: abrasive products and rubbing create scratches with no benefit, since the piece will be melted. Focus instead on what matters: identifying the fineness from the hallmark, weighing correctly, and comparing silver buyback offers rather than wasting time polishing.
The reasoning reverses for a piece sold second-hand or as a collectible: branded silver plate, a complete service, a decorative object. Here appearance matters to the buyer, and a clean presentation can help resale. Dusting and a gentle wipe are generally enough.
Caution still applies: aggressive cleaning can damage the patina, wear the plating and reduce value. Never sand or abrade. If in doubt about the nature of the piece, check the hallmark first, as explained in our guide on Christofle cutlery and resale value.
Boil your decision down to one question: is the piece headed for melting (by weight) or resold as it is (second-hand)? In the first case, do not clean it; in the second, limit yourself to gentle, reversible cleaning.
In both cases, avoid abrasive products, aggressive pastes and any sanding. If you are unsure of the item's status (solid or plated), refrain from cleaning until the hallmark has been identified: an intact piece to be valued is better than a scratched one. A neutral piece of advice: when in doubt, do not over-clean.
No. For a buyback by weight, value depends on the fine weight and the price, not on appearance. Cleaning adds nothing, and an abrasive product can scratch the piece needlessly.
Yes, for a piece sold second-hand. Aggressive cleaning can damage the patina or the plating and lower the value. You should never sand or abrade: a gentle wipe is enough.