same exact thing happened to me in my 1st car ('87 Toyota Celica) when I was 16. Some guy swerved and hit my passenger rear wheel and I went spinning across traffic (luckily I didn't hit anybody else) into the dirt on the opposite side of the freeway from where I was driving and I rolled 5 times. My brother and our girlfriends were in the car with me. They all walked away but the roof smashed down and got me pretty good in the head so I was taken away in the amber-lamps. Scary stuff, I'm glad you're ok! If they're giving you the $$ that you have into your rig, I wouldn't worry about buying it back.....just find out which junk yard they take it to and be waiting! 
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