Situation:  Found a couple of 312 blocks out of state. Checked by owner who pulled the pan ECZ on caps and both standard bore.  His dad was in the wrecking business and now he has to clean out his semi-trailer.  The blocks he says have been in there for about 20 years. He also pulled the caps and visibly couldn't see any cracks by the threads.

Question: He wants a cashier's check for the blocks because of the amount.  Could I be really sticking my neck out for this or is this normal for people to buy larger parts this way? Any safety measures I can take?

Appreciate your advice.

Idaho