as above, go for a a solid shell one, the lump with 100k on will show it is a strong one imo, they used to pop at around 50k often due to poor servicing so keep the oil changed.

Great cars, love them and owned a few and as has been said, if you are unlucky enough to get one that lets go of it's bottom end, then they are cheap to replace the lump.

Cambelt will be due at 100k so check it has been done and if not, do it! Phase 1 and 2 both had issues with the engines iirc.