I normally sell my common pets for $2 each. I don't know all the rare ones but the little black kitty to the right of the G1 zebra will be worth more. Also the cocker spaniel (3rd from left, 3rd from bottom) and the beagle (below the cocker spaniel). There might be a couple others but those are the ones that stand out as being more sought after that I know of. Just depends on if you want to sell everything as a lot in one go or put it in your sale thread and let people buy individual.
On eBay you could probably get like $100 give or take. Some lots that size only sell for like $45 though so I would put it as a BIN of the price you want 'cause with bidding there is no guarantee unless you put a reserve. Or if you sell here I would put it at a lower price since you wouldn't have to deal with the ebay fees.