You can actually drive it, the pedal area is small, so big feet and shoes are out, at least they are in mine.
I have a narrow pair of trainers I wear for driving my car.
Engine and gearbox for rattles and oil leaks.
Oil pressure, I am assuming it is a rover V8. Oil pressure is low in these engines, but should reach 20-30 when warm.
Suspension wise, if MGB based, all parts are easily obtainable.
Other than that, if it doesn't feel right, walk away.
Out of interest, is it the blue one that was on Ebay recently?
You may also want to start this thread again as a new one.
Hope this helps.

Martin

Thanks Martin,
Yes it is the blue one on e-bay,rover 3.5 haven't owned one before so all is new to me,will bear in mind what you've advised.
Thanks again.