Tbh I've owned/own both and I actually think the 4x4 is a better car to use on the road as it does actually handle well and stick to the road a lot better than the 2wd,but getting it sideways which the 2wd does very easily is super addictive!!!

As said above get one that's bodily in the most solid nick you can and I don't mean on the outside but more the underneath really,absolutely everywhere can rot on them as I found out on mine.

If the sellers genuine he'll have no objections to you taking it somewhere to get it up on a ramp for an mot,no matter how recent it may have had one.
This is no reflection on who mot'ed it for them but rather to see if it "just" got through a ticket or is in fact a nice clean one or even any welding done was done to a high standard and should be good for years to come.

I've just reshelled mine into a mint white shell as in the end mine was too far gone,needed inner and outer sills,strut top welding,had already done chassis legs,jacking points,various bits elsewhere so was unfortunately always honing to be a rotbox.

This new shell looks superclean and looks to have years of life left in it and I'm looking forward to getting it all up and running,the motor and everything else is in but as it stood so long there's a long list of parts to get it mint again.