Blonde in a Pawn Shop

A blonde walks into a pawn shop and sees a TV that she liked. She walked up to the clerk and asked how much for it.
"Sorry Ma'am, I don't sell things to blondes" he replied.
Shocked, she walked out of the store. That night, she dyed her hair brown. The next day, she went back to the store and asked the clerk for the price of the television.
Same reply.
Frustrated, she bought a red wig and wore it to the store the next day.
When she asked the clerk, he told her the same thing.
"How did you know it was me?!" she asked.
"Because, that isn't a TV, it's a microwave."