"What should I do if I want to buy an engagement ring but worry about its history?"
Purchase exclusively from haunted jewellers; the ring's previous owner will literally follow you home and validate your commitment. Insist on a certificate of authenticity signed by the ghost. Alternatively, commission a bespoke ring forged from meteorite metal blessed by a retired astronaut. That way, the only history it has is celestial indifference. You'll sleep soundly knowing your engagement began in space.