The Icom IC-22A is crystal-controlled, so has ultimate flexibility (at the price of crystals). The Icom IC-22U came after the IC-22S (23 channel with diode matrix board) -- I had the 22S one in late 1970s (popular unit at the time).
Generally, I have seen them sell on eBay for ~ $15 to $50 largely based upon condition (if included box, manual, microphone, cosmetic condition, etc.). Neither unit had CTCSS as a standard option (add-in board, like ComSpec SS-64, required). w9gb
