They do the same thing in Arkansas. For long guns, some guys will even create a small sign like a flag that has the kind of gun and the price. Put the stick that holds the flag down the barrel, and everyone can see what it is and what you're asking without having to bother the seller.
A gunfight is not the time to learn new skills.
If you ever have a real need for more than a couple of magazines, your problem is not a shortage of magazines. It's a shortage of people on your side of the argument. -- Art Eatman