hi guys im new to this jetski and no idea whre to start from, i just have a couple of questions, i found a guy selling a 1996 seadoo xp but one of the cylinder has a low compression, is this a easy fix and is it worth buying for $400, the guys said it starts right up but it needs a new battery,, any answer will be appriciated and if this is not belongs here pls accept my appology