The first thing that comes to my mind is the OFNA Hyper 7 TQ. Good buggy and plenty capable in the right hands. If you use the coupons from Tower Hobbies you can pick it up for right around $200.
http://www2.towerhobbies.com/cgi-bin...?&I=LXJLE8&P=7
There may be better options though depending on your budget. How much do you have to work with? Also, don't rule out buying a used buggy. Sometimes that can save you a lot of money.