the V6 is nice, but don't expect a lot of bolt on performance....the market is just not there.
for 4 cyls:
Things to look out for/expect the gas gauge might not work. the balancer shaft seal needs to be clipped by the deal or you'll end up dumping all your motor oil in about one minute. Paint quality is often suspect. look for rust in the wheel wells. the exhaust will rust out.
look for the basics, maintenance records and general condition.
noel