honestly, if you're not into technical stuff i would pass on this Jeep.
there could be a lot wrong with it. or very little. even if you get it running well enough for a test drive something else may crop up. vehicles that sit for a long time without proper storage prep eat hoses, get water in the gas tank, kill batteries, etc. do you really want to troubleshoot someone else's Jeep?
that said if this can't even drive itself away the guy must be giving you a good deal on it.
personally i wouldn't pay more than $500 but i would buy it just for a (probably) rebuildable inline six and the tub/unibody as long as it didn't have any rust issues. but that's me wanting to kill myself with another Jeep