Thats a hard one??
I took a $250 check for a pick-up dog box from the director of my county's social welfare department once.
And a fine upstanding citizen she was, according to all the local newspaper story's over the years.
Then the check bounced, and I found out later the lady had already been fired before I got the check.
Turns out, she apparently needed a dog box to leave the state in a hurry!!
I never seen the lady, the dog box, or the money again!!
Seems to me in this day and age, there is a ATM on every corner, and real close to almost every place they have decent gun shows.
It behooves the buyer to come prepared to buy stuff that costs that much!
I believe I would take the $500 as a refundable deposit to hold the gun, while he went to an ATM and got the rest of the money he should have had in the first place.
rc