“It was kind of just the easiest option,” she said. It was easy and free to post. Lauer listed her car and within a few months got an offer. “(The buyer) test drove it once and then I think that night or a couple of days later, he said he wanted to buy it,” Lauer said. She said the buyer paid cash — she wrote a receipt and didn’t give it much thought -- until she started to get bills from the North Texas Toll Authority. “I think early March was when the first bill came in,” Lauer said. “I've never used it enough where I would need a TollTag or anything like that."