How mechanically inclined are you? You can't just waltz into Wal-Mart and pick up some floor boards. Often people will accessorize junk vehicles to give it a nice appearance (sorta like the one I just bought!
) Check out the frame and body mounts for rust. Dude, if you have any chance of having a mechanic friend to look at it with you, do it (and fast). There could be a million unknowns that a mechanic could detect and project into $$ to fix up. That's bargaining power, too, if you had to put $1500-$2000(for example) into fixing motor, floorboards, brakes, steering, etc.. to make it reliable AND safe. Always offer less, maybe $1100 and top out at $1400 (unless the engine, and body is in mint condition--which it's likely not). There's lots of headaches that the current owner doesn't want, so you'll get em if you buy it. Give it a test drive for sure! Warning-you might fall in love with it.
But let me tell you--from a recent, first-time Jeep owner--I LOVE the headaches because driving my '71 CJ is awesome! The intangebles are great, especially on an older model '69. Give it a drive and give us more details!