so somebody is offering me bitcoins ridiculously cheap. and he's probably trying to scam me. but it's too good of an offer, i have to see what's up.
how many confirmations is safe? (i'm buying 40btc)
i'm gonna meet him in a bank to be safe. and not gonna hand him any cash until i get the btc.
anything i should be concerned with?
Using escrow will be better than dueling just with the seller and make your amount are more safe and i think that is the best answer for you in this time.
Escrow for an in person Bitcoin trade? There would be no need for that. As already mentioned in the thread just bring someone or two friends with you and go meet him in the bank. I also would suggest that the one you are trading with to email you his ID and his Facebook page or some other social media account. Always be safe, good luck with the trade.