Without having zero (or close to zero) resale value, there is a risk that proposee is incented to leave the marriage with the ring and capture the value. If th

Without having zero (or close to zero) resale value, there is a risk that proposee is incented to leave the marriage with the ring and capture the value. If there is no value, then there is no incentive to leave. The incentive for the proposer is that they can't afford to keep purchasing rings.