well it depends on the condition of your old one if it works good i would do it. i would TRY to do it with mine but idk if i would make enough off of my piece of crap. The reason i want it is because for some reason god of war and midnight club 3 wont work on mine but they work on my uncles(he has the new one) so i bought those 2 games and i have to go WAY over there to play them and its a pain in the ass
How much are those new ps2s anyway? I saw one and man they are so much smaller! But I doubt I would sell mine just because I'm fine with it and really don't feel like spending more money, even though its not as small.