If this is the same car, I can tell you that (from what the previous owner told me) It was at jps for a rebuild to the engine (cannot remember internals) and it was at tein in Milton Keynes to have the suspension set up. It all sounds correct, however, the current owner seems to be writing the advert as though he's done this...he hasn't.
I bought a bonnet from the previous owner, and he delivered it in this supra (it does fit, I can assure you lol) and that can't have been anymore than four months ago, so I'd be asking why he's selling so soon. Probably worth a look?
Old sale advert http://www.mkivsupra.net/vbb/showthread.php?315621-94-Single-Turbo-6-speed-manual-road-track-car-%A314000-(Dorset)