Hexbug sells these at $149.99, yours at Costco for $79.99 with free shipping (or brave the store!)
The ultimate STEM Robotics kit is here! The VEX® Build Blitz Robotics Remote Control Construction Kit has over 800 easy snap-together pieces and can be built into seven different motorized robots (one at a time) without the use of tools. Bring learning to life in a way that gets kids excited. They will get a great introduction to science and technology when they build with the smart brain, remote control system, motors and wiring. VEX® Build Blitz Robotics Remote Control Construction Kit is the perfect launchpad for young engineers! Use your smart phone to control your build with the free downloadable VEX Pilot App.
it’s a pretty amazing deal, again for parts, but the robots themselves are a great build. Please note that these motors are not the same high level of build that the VEXIQ ones are. I’ve managed to strip the gears from one. But it may not make a difference to you, since the electronics are not legal in competition.