I'm selling my 1990 KBS Mk5 (which more closely resembles a 1998 KBS Mk7 by now). This car is a huge value for anyone just getting started (it's incredibly reliable), or looking to move into national level competition (it's also a well sorted and quick car).
Highlights:
Fully "turn-key" car - competed as recently as October 2012
Rotax 494 (500cc), 4-link rear suspension
Includes 4 sets of wheels, including one set of sticker tires, one set of
reasonably fresh tires.
New fuel cell
New battery
Full ad and description: http://scootin159.com
Asking $5750