Legacy Motors They are in the business of reposession not selling Arlington Texas

"The car started overheating until it finally died out,"

As soon as I read that, I guessed the rest of the story.

"now anyone that knows a little bit about cars knows that a motor does not blow that fast it is an ongoing process of months or years."

You couldn't be more wrong. If you continue to drive a car that is overheating until it finally dies, you've very likely killed the engine. An overheated engine cooks the oil which leads to a total loss of internal lubrication. The intense heat will also warp the cylinder heads. This can happen to a brand new engine if you drive it overheated until it won't go anymore.

What you're supposed to do is pull over at the first sign of overheating (temperature gauge, idiot light or steam coming from under the hood) and take care of the problem with the cooling system. Something as simple as a $10 leaky hose can cause a car to overheat, but if you just keep driving it, the $10 problem will soon become a $2500 problem.

Why did you buy a used car without taking it to a mechanic to get checked out?

Additionally, when you put the 500$ down, I assume that was to purchase the vehicle?

If the car was sold "As-IS" then as soon as you drive it off the lot, it was yours. The lot was not liable for anything that went wrong with it. If you did sign a contract to pay for the car, then yes it will go on your credit if you don't pay it.