if it's cash, then another vote for getting the buyer to pay directly at the counter. You dont physically touch the money.
I did this when i sold the 4mo, it was a bit of a chavy type of guy. Paid into my a/c at the counter, he handed over the money - the lady counted it and it was £20 short. He swore blind that he counted it 3 times the night before...
also, if there any decent forgeries in the bundle, the bank can reject it with the guy there rather than you trying deposit the cash later, getting any fakes rejected and then having to contact the buyer again....
Rich