Airtronics 92524 can be found for under $50. Keep in mind that for some of the vehicles you don't run very often you can swap the receiver into another car with zero issues. The cars setting are in the TX so no worries. The 92524 is also small but it does not have some of the features of the $100 ones but it still works great regarding compatibility with servos and escs which is THE big reason to run Airtronics. The radio is the single most important investment you can make in the hobby. I stepped into the MT4 to replace my Airtronics radios from 1990 that till work like new.