I remember visiting this website once...
It was called Fandom Auctions
Here's some stuff I remembered seeing:
Jackal partial fursuit (custom fullsuit buyout option)
Custom Fursuit Feet with Claws + Pawpads
Steven Universe COOKIE CAT Plush Prop - Made to Order
Nightmare quad stilt costume (may be able to be adapted to a quad suit)
Dragon Mask Resin - By Raptor Arts Studio
Explosivo the Creeper Angel Dragon Partial Fursuit Ladder Auction
Custom Fit Cotton Candy Theme Angel Dragon fullbody Fursuit
*Starting bid $1000 less than commission price!