dump some lighter fluid on the blades and work it for awhile. thats only if the camera doesn't have any sentimental value, you might find one in brand new excellent shape for the cost of your repair.
I actually have one of these at the place where I work, but the alignment is broken/off in the viewfinder. So i never got a chance to use it.
I have two classic rangefinders (VT and Retina 3c) I've been wanted to get repaired and CLA'ed professionally at Nippon camera (NYC) but I'm very afraid of the price as well. I'm guessing starting price for just a CLA would be $150 for each for me.