Sump gaskets can leak, but then again what does he mean by oil leak? Some people could say a small weep as a oil leak, and yes technically it is leaking oil, but probably not worth loosing sleep over, on the other hand I've met a chap that said his car had a oil leak and it was gushing out as quick as he could put it in lol. So you'd have to make your own judgment on that, but seeing as you've owned a series 2a you should be fairly accustomed to oil leaks

lol
Rust and how it runs are the two things to worry about the most. A weeping gasket won't be a big problem to fix, and most of these trucks as long as you keep them serviced and clean they'll keep going for many years!
Places to look at for rust are the sills, particularly the rear of them just infront of the rear tyres, behind the front bumper along the bottom edge of the rad and front edge of the bonnet
My 2.8 shorty - now sold, and
comments hereMy old dti - now sold
"Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming "WOW --- What a Ride!"
This vehicle runs on 100% recycled dinosaurs