FWIW... I picked up my Wahoo KICKR Snap used on CL for about that much. But I also didn't have a trainer to start with... and the idea of riding indoors made me feel bad about my life choices, so I made the investment in something that had promise to be more engaging for me.kinetic does make a resistance enabled smart trainer control head that's compatible with the unit i have..... for $350.
Kinetic — Kinetic Control Power Unit - Bike Trainer
Part of our newest generation of interactive, app-controlled trainers, offering the best power-training workout available and now featuring ANT+ FE-C and Bluetooth FTMS and a more accurate and responsive ride. The NEW Kinetic Control Power Unit installs in minutes and is the most affordable and convwww.kurtkinetic.com