Those R22's are sweet looking. Especially for those nostalgic HK lovers who have an eye for the G3/91, 93 MP5, etc. I had though of getting one before learning that they can be hit and miss on reliability and being discontinued for a decade makes parts scarce, plus the $1000 price tag used makes them less atractive. There were not a lot of them imported, but they do show up in the EE on occasion. Good news is the rifles have a lot in common with the 10/22 and many of it's parts can be acquired from that type or modified from it. It also uses the 10/22 mags.
All this that I rambled off on is what I learned during my time looking for one. I have no first hand knowledge so I could be entirely wrong about all that. Please correct me if I am wrong.
Moe