There are a couple of RC tanks out there that I'd really like to get ahold of, but I would want a 1/8 or 1/10 size atleast. Is it possible to get a tank with some metal at a decent price (under 800$)? Or any other tracked vehicles in the 1/8 class?

http://www.mark-1-tank.co.uk/index.html has 1/8 tanks but IMO 2000$ for a chassis is far too expensive. (I would like a 1/8, I don't absolutely desire one. BTW you should check out the 1/4 tanks at the link if you haven't seen em already. Pretty cool.) More info on the large scale tanks here http://www.gizmology.net/tanks.htm (Lots of links at the bottom of the page.)

I'd be satisfied with a plastic chassis (As long as the exposed parts are made of something slightly durable.) as long as it's 1/8 and under 800$, preferably around 250-400$