Good advice, take someone else that knows about bikes. If you can, get someone that can ride it to. The GPZ is bigger but the 250 pprobably more reliable and great to learn on. Don't act in haste, it will bite you every time, and there is always another deal around the corner. A bike that has been down in a crash or fall will have signs on the tankm grips, foot pegs, muffler and any other surface that sticks out from the bike.