Reconstructed, salvaged, rebuilt, titles

Hoping you can help me understand. So, my son wants to buy a Subaru wrx car. The turbo AWD car. He works for Subaru now. Anyway, he sends me listings multiple times a day for these cars. Its amazing how much these cars are worth for cars that are 10/12 years old. And the volume of modifications done to them. And I'm assuming vastly owned by a younger crowd. Which I think is what leads me to my question. Most of these cars, or a very strong portion of them have salvage, reconstructed, or rebuilt titles. Cause they are all getting wrecked. Some say, only minor damage, others say more. I don't usually buy cars with titles like this, so I'm asking. Does this greatly affect the value? Cause these cars are anywhere from $7k for a wagon to $30k or more for one 10 years old. What's the deal with the DMV on transferring a title like this? What do the insurance companies say about this? I tell my son he doesn't need a car like this. But he is an adult now. Has a good job and works everyday, and will be paying the payments and insurance.