Feel free to learn from my mistakes.

1. If you smell antifreeze its probably got a leak.
2. If the person you bought it from has installed lights onto your side mirror then the mirror probably doesn't work anymore.
3. if the person you are buying fom has made a custom exhaust by cutting out the resonator, and painitng the muffler red walk away...who knows what esle they did.
4. Test everything it sucks to be half way home and discover that the wiper blades are improperly installed, especialy when its raining

A few other things to check are,
1. Smell the tranny fluid if it smells burnt...it is,
2. Take it for a drive then check the wheels for heat on the rims if the bearings are bad they can heat up the rims
3. Test everyhting electrical.

probably the best thing to do is find a member near by and ask them to look at it, Like Seraph said, take it to a garage have a Mechanic give it a look-over it may cost you a few bucks but could save you in the long run.

Welcome to the Forums, I'm pretty new also but so far everyone is really cool, and this place is an excelent source of info.

Shane