I would obviously demand prospective buyer couples engage in a team gauntlet against each other as part of a dystopian championship ladder for housing. Perhaps I'd integrate "ninja warrior" aspects to the challenge, culminating in a couple's cage match. Prospects would train for years to compete in my league: building themselves up; mentally preparing themselves; needing to be absolutely perfect to have any chance of winning. Losers would be banished from the neighborhood, perhaps even the city, forced to live on the outskirts.

Or maybe some economic analogue of all that.

Anyways, the allocation is a matter secondary to the price: the point is that I can find a buyer for the lower price, and there will always be prospective buyers who think any allocation scheme is unfair, especially when they're crushed beneath the matching Ugg boots of Jan and Pat, the couples doubles doomslayers.