TexasCHLforum.com

A typical sale involves the exchange of cash for goods. If you require a bill of sale, a certified copy of the other person's CHL, payment in gold, or any other special conditions, you should specify your conditions from the beginning. For example, when I sold a gun I said "CHL only" and "cash only" in the ad. When I sold it I insisted on seeing their CHL because I put that in my ad from the beginning.

I would be very suspicious of someone trying to change the deal at the last minute.