So you've never bought a gun from a retail store?I will not relinquish my license to anyone other than law enforcement. Most definitely not to a business that wants my business. I would simply say no (I guess I could ask for the salespersons license for me to hold while he held held mine).
Y'all do realize you'll have to give them your drivers license when you fill out the 4473 to buy the gun. If someone was serious about buying a gun I don't see why showing them your drivers license a few minutes early would be a problem.