I am going full futaba and have four JR receivers for sale. Two are the R700 model and two are the R600 model. They all have different channels. They are 44, 46, 46 and 23. All are in perfect working order. If you are interested I want $20 a piece for them plus about $1.50 shipping. Let me know if you are interested. Oh, they are all about five years old.
Ted