It's real simple.
$20 per gun transferred*.
I also ship handguns! $25 plus shipping cost. I ship using U.S. Mail Flat Rate boxes $11 + $1.50 per $100 of insurance. It's important that we agree on the insured value. (See FAQ about shipping guns.)
To keep my fees low, I don't accept credit cards. CASH please...
* If you get denied, I'm going to charge you $150 for wasting my time, the other FFL's time, and the sellers time. You put us all in a bad situation and most people know if they can get a gun in advance!