WotC is auctioning 5 galley proofs for 5E products to support Extra Life - a Children's Miracle Network Hospitals fundraising program.
Icewwind Dale: Rime of the Frostmaiden (and alternate cover)
Tasha's Cauldron of Everything ( and alternate cover)
and
Explorer's Guide to Wildemount
Prices range from $182.00 to almost $500.00. (as of 11/15/2020 @ 9:30 am)
I know some of you don't play/don't like 5E, but how about taking a look and shooting a few bucks to the charity directly.
Charity website(ok that's weird - auction website comes up in preview but not on submitted post
Dungeons & Dragons | eBay. Shop galley proofs and support Extra Life)