Stop trying to buy a six pack one beer at a time at Valero

On a recent stop at the Valero on 17th and Grand, I noticed this sign on the beer cooler. I’ve never thought about taking one bottle of Miller High Life and trying to barter for it, but that happens so often at this gas station they needed to write declarations.
“All the time,” said the woman at the cash register. “They pull one beer out of a six pack and bring it up and try to pay for it. Even with the signs up they try to do it, and we keep telling them no.”
The logistics and need behind trying to buy only one bottle of beer fascinates me. Maybe more than it should.
“I don’t know what they think a good price for one beer is because we tell them they can’t buy it before they offer anything, and I can’t ring it up,” the cashier said. “Sometimes they do get mad when we tell them they can’t have it.”
If you were in a situation where buying one bottle of MGD at the downtown Valero seemed necessary, you’d be pissed off too.