A blonde went to the appliance store

A blonde went to the appliance store sale and found a bargain.

"I would like to buy this TV," she told the salesman. 
"I'm sorry, we don't sell to stupid people," he replied.

She hurried home and changed her clothes, then came back and again told the salesman "I would like to buy this TV."

"Sorry! We don't sell to stupid people," he replied.

"How, did he recognize me?!" she thought.

She went for a complete disguise this time- a haircut with a new colour, a new outfit, some big sunglasses, and then she waited a few days before she went back to the store again. She approached the salesman once more. "I would like to buy this TV," she said.

"I'm sorry, we don't sell to stupid people," he replied.

Frustrated, she asked him, "How do you know I'm a stupid person?"

"Because that's a microwave!" he replied.