I don't think there will be a huge price drop or ever, for that matter. Leica hasn't switched completely to digital photography and their film bodies are still made. They still pride themselves with their mechanical film cameras and will continue to do so for the time being.
The reason for a price drop in film SLR's is because of 1) the surge of dSLR's to hit the market and 2) the widespread demand to use one/for someone to use one. Many people and professionals like using SLR's. Digital is the accepted medium for most professional applications these days. It's easy to understand why FILM slr's were so quickly booted out by DIGITAL slr's.
Rangefinders, on the other hand, have not been in the spotlight for well over 30 years. It's now a niche market. Nowadays, people who use rf's have accepted that they will have to shoot with film (up until very recently, of course). Also, the lack in national/global market demand for digital RF's means there will probably never be the same digital surge that SLR's experienced. Therefore, film RF's will remain abundant and in demand by collectors, hobbyists (see the other thread), and the few professionals that choose to use them.
Price drops in bodies usually only ever happen when a new model comes out so everyone ditches their older body for the new one. This kind of happened with the M8 but not to the extent where the entire market price of the older bodies dropped - there were just a few more used film bodies available.