Specialists aside, I fear the biggest unexpected surprises are to be found inside the engine. No original block I've seen the past three years (and I've seen a few believe me) was in good condition.
Luckily there are new engines being built in Italy, but there is a price tag attached. That's the biggest gamble in a Lambda purchase in my opinion...and off course it's not possible to have a peek inside, even for a 'specialist', unless it's about a dismanteled project car.