I've received several calls from them about my time running out to extend my warranty. They've called from 213-710-8113, 214-540-8973, unknown #, private # and another number that I don't recall. I have a car on AutoTrader also, so I guess that's how they got my number.
Its not a scam... caroffer is a legit company that offers to purchase your car outright... similar to carmax but without trying to sell you another car. i'm not sure all the ways they get the numbers, but my bf got a call from them and he had his car listed in autotrader, so i would assume that's where they get them. you can speak to them and have your number removed from their database if you don't wish to have them call you.
I've recieved several calls from Caroffer 214-540-8973, 214-453-3000, they offer you virtually NOTHING for your car, any local used car dealer will offer more for your car, this is another reason I refuse to shop at PepBoys.