Is Copart really reliable?
This is a bad way to buy a car for someone who doesn't know what they are doing. Most of the people attending will be experienced experts. How do you expect to get a great car at a great deal with that kind of competition??
Its a salvage car auction. They do what they say they do but there are no guarantees on the cars or your ability to build/repair them. Bottom line, from your question, you have very little chance of a positive outcome because you have no idea even the right questions to ask.