Affordable Tires & Auto Repair

I bought a car from him, test drove it, and he said it was fine. Went six miles and the check engine has been on since. The car hasn't been drivable. I paid $2000 cash for this car. At the end of many, I got six miles down the road and the check engine came on. Called the guy back, he said it was fine. They had just done everything that needed to be done. Took it to AutoZone and Advanced Auto, Amco Auto Shop, Krugs Auto. Got 6 or 7 codes that came up. I've fixed the power relay and brake switch, but no one can figure it out. Finally went to the dealership and they are saying it's a power control module that they no longer make. After parts and labor, it'll cost about $1000 to fix. I've called again, he's very rude, basically saying, "Oh well, it was fine when you left."