One bad thing about tri state is they won't hold gun at the store if a person is delayed. So if the buyer is from out of town you will have to meet again within 30 days of the proceed.
Several FFL's have that policy. If the firearm is kept at ffl due to delay, it becomes the ffl's, (entered into inventory).
If check comes back denied, the original owner will complete a 4473. If he is subsequentiallt denied, firearm stays at ffl..