Your piece needs repair — a broken clasp, a loose stone, a bent prong, a missing accent stone. You want to sell it. You do not know whether fixing it first will pay for itself in a higher selling price or whether you should sell it as-is and let the buyer handle repairs.
Always repair before selling. A broken piece looks bad and sells for less. Fix everything.
"Does this specific issue prevent the piece from being worn — or does it just affect how it looks?"
Get a written estimate for the specific repair. Compare it against the piece estimated selling price. If the repair costs less than twenty percent of the selling price and makes the piece wearable, it is almost certainly worth doing.
Fix functional issues — broken clasps, loose stones, snapped chains. These prevent the piece from being worn and buyers discount heavily for them. Leave cosmetic issues — scratches, patina, dullness. The buyer can choose their own jeweler for finish work.
Functional repairs typically increase selling price by more than their cost. A fifty-dollar clasp repair can make a five-hundred-dollar piece sellable. Cosmetic repairs rarely return their cost — a hundred-dollar polish does not increase the selling price by a hundred dollars.
Only if the replacement cost is significantly less than the value it adds. A missing small diamond in a ring may cost fifty dollars to replace and make the ring sellable. A missing large center stone may cost more to replace than the ring is worth. Get estimates before deciding.
Yes. Many buyers — especially dealers and refiners — buy pieces as-is and handle repairs themselves. You will receive less than for a piece in good condition. Whether the discount is fair depends on the repair cost the buyer will incur.