I have a JG 1952. I gave $100 for mine a long time ago. Generally, the false backstraps usually settle around $100 to $125. Of course, condition does drive some lower and some higher. The RCS and the JG false backstraps are pretty regular on Ebay. The MCI false backstrap is the harder one to find, so far. Cant confirm it or anything, but I have always felt that R.C.S. may have also made the JG false backstrap darbys. Again, thats only an educated guess on my part.
-Richard Knip-