Most of my teens were spent around RC cars. I had a little 2wd monster truck that I putzed with around home that I bought secondhand off of one of my brother's buddies. I think it was a Traxxas, but I can't remember. I played with it, rebuilt it and made money off of it, so at the end of the day I showed black ink. My brother, on the other hand, was an absolute nut over these things. He had an Associated RC10T2 stadium truck that was an absolute monster. I don't remember how much much scratch he put into it, but I remember taking him all over northeast Wisconsin for races. I remember every day I had to run him and his buddies around because that was the day that my dad would take my '78 Malibu to work and leave me his Suburban.
His interest kind of petered out of it when he and all of his buddies started getting real cars. At that point, all of his money went into his '81 El Camino. He still has all of his stuff, but I don't think much of it will see the light of day again.