Can a dealer sell used car with bad frame?

No, a dealer cannot legally sell a used car with a bad frame. The frame is a critical safety component of a car, and selling a car with a bad frame would be a violation of consumer protection laws. A bad frame can compromise the structural integrity of the vehicle, making it unsafe to drive and more likely to be involved in a collision. If a dealer attempts to sell a used car with a bad frame, you should report them to the appropriate consumer protection agency.