How much will i get for a fat ps2?

Definitely not much, they give you crap for games, and now that PS2 games don't even have a section in the store because their getting old, they aren't going to sell for much. They sell PS2 games for cheap, you'll have way more money selling it on craigslist. Probably 60 at gamestop, you can probably get around a 100 or more if you list it at craigslist.