So, I apparently used this site a couple years back, and just now refound it. After going through the pets I had and feeding the ones I intend to keep, I have many pets I'd like to sell, but checking the forums didn't really help me find my way as to how to do that. I know I can sell them from their profile, but I cannot for the life of me find an auction house and look up the kinds of pets to figure out how to price them. Aside from that, I think I can figure out the basics, but I'd love to clear up some room and figure out where to go from here. Thanks for checking this out, hope you have a nice day!

Somewhere on your page you should see something that says "Search" or "Advanced Search". Click on that and you should reach the advanced search page. Click on the pets section and then put in the type of pet that you are looking for.
Also most players just use the pet auctions forum to advertise the pets they are selling. There isn't really an auction house.