Recently I purchased a gun from out of state from a private party. He payed a certain amount on his end for the transfer. It got here to my FFL which was a wharehouse style store. I then payed a transfer fee and before getting checked out I was asked what I payed for it for tax purposes. I was unaware and am still not sure how they can be taxing me on the purchase when it was a private party sale. No money exchanged hands through either FFL for the sale. Any thoughts? Anyone with experience on this?