Actually, i found that prices for used (not prefect, boxed, new) Leica equipment have gone down here in Switzerland, based on what i have seen at local auction sites, and on the "used equipment" lists of bigger camera stores. That made the M4/M6 available for me.
A very nice, serviced M6 can be found for 1000.- Swiss francs, a nice Summicron 35mm for bout 500.- A M Tele Elamrit for 300.-
It used to be at least 20-30% more one year ago.
Up are only the prices for boxed and never used ones, and perhapse for 50mm lenses.
So i think if you see movement upwards, it is only the collectors (mostly Asia) and M9 users (so are there more of them around than I expected?)