Our MoonBots partner in Australia, Rotacaster is having a sale on their website with a 15% discount on the Rotacaster Omniwheels that fits both VEX and LEGO MINDSTORMS robots. You can find their website via www.rotacaster.com.au
Use the discount code: RoboticsXmas to get the discount. The sale ends 19 December 2014.
Good luck with building robots out there!
The MoonBots team