God Bless the USA
You can have two sided cards, with one side with closed boxes and hints of furniture and other big ticket items. Once a unit is bought, you flip the card to see what the unit is worth.
A secondary game mechanic is getting the right appraiser afterward.
Of course, I can see some screw-your-buddy bid raising and dumping happening in the game, coupled with the cost of hauling goods and other overhead draining your cash.
Reminds me of the card game For Sale.