Well, I think most people will tell you to just check for rust/rot in sweet spots like strut towers and any structural rust. As far as the price, if it runs good then I'd say 1500 with a new clutch is a good buy. I'd still offer less just because I'm a cheapskate
As for oil leak, that is pretty vague. You'll have to ask where it's leaking and how bad it's leaking.
Mine is only leaking oil through the pan plug. I ordered a new one with a gasket like 5 dollars.
Low miles and looks clean. I'd say go look at it and pick it up!
Also be aware that water leaks are very common and inspect things very carefully. Also look at the fuse panel/relays and look for rust/corrosion.
I dunno looks good to me, wish I would have seen it