A Generous King Indeed

The legend in ancient Siam, now Thailand, a king gave a X Y to someone whom he did not like. The albino Y was considered sacred and holy in ancient times. Keeping a X Y was a very expensive undertaking, since the owner had to provide the Y with special food and provide access for people who wanted to worship it. The recipient could not get rid of Y because it was a gift from the King. The gift would, in most cases, ruin the recipient.
A X Y sale is a sale in which you get rid of things have become a burden but are too valuable to just throw away. In the nineteenth century the phrase was used at church bazaars called “X Y sales” where donors could bring unwanted items. This term is still used today usually referring to an item that’s not useful (decorative) but may be expensive and odd.
Well, 'X Y' is what we need.