You probably don't want to hear this, but you are going to get like $10 tops. Nobody wants a ps2 anymore, they are to young to be a classic and too old to be much fun.
This. One of my PS2 games sold for 30 cents ._.
Its cheaper then gum. Its cheaper then a PEICE of gum from a pack.
Your going to get hardly anything so i suggest holding on to and and keeping it in mint condition for... 20 years. That way it'll get some value :D