Don't hesitate, participate!
Auction huge fake cat for 1 gem 😱🔥
Roblox's Pet Simulator X recently added the auction board to the game. This allows you to bid on another pet owner's ultra rare pet for a hefty amount of diamond.
This also allows you to interact with other pet owners in a large number of groups while doing your transactions. So if you have any pets to trade or sell, you should look for the auction board.
Here is a short guide showing the location.