I post pets on a lot of different servers at 48 hours. On the interim day I check to see if I've sold anything so I can pull any sold pets out of my pet collection to make room to buy more of those pets if I can. It keeps a good flow to everything since we're limited to only 3 of each pet in the collection. Anyway, if I don't get any sales on a server and I'm aware before logging in I don't need to go through a loading screen and that can save some time.