The price for the CheapBot-18 version 1.0 (CheapBot-18) is $37.50 plus $4.00 S&H. The CheapBot-18 kit contains all the necessary parts except for solder. An assembled and tested CheapBot-18 is available for $47.50 plus $5.00 S&H. If ordered with a robot body, shipping is only $2.00.
Instructions for assembling the CheapBot-18
Instructions for making a progamming cable
Datasheet for the TA8080K motor driver used in the controller
A Squeak eToy demonstration program of the CheapBot robot
Link to Squeak Land where you can download Squeak eToys - it's free!
To program the CheapBot-18's PICAXE-18X, you'll need to download the PICAXE Programmer. It's free at this link