dude... i was thinking the same thing you were, at first i thought ok..... they're toys, now i see that they go over 40 mph and can catch serious air plus their suspension is kinda cool..... anyways.. if you go to
www.hobbytron.net they have some real cool ones that can go REALLY fast and do jumps and stuff they kinda expensive tho($300-400) ( b/c thay are gas, go fast and they are top quality) ).
nylint makes a scorpian buggy in 1/6 and 1/18 sizes. o yea did i metion that these nylint ones are pretty cheap $40 for a 1/18 and the 1/6 is $200
http://rccrawler.com/ they have some stuff there too