The funny thing is that Pythons aren't scarce. There were several hundred thousand made, and it's probable that most are still around and are in good condition. There are usually two to three hundred for sale on Gunbroker at any given time. It seems that every Tom, Dick and Harry thinks he can sell his Python for a huge profit. With so many on the market, sooner or later the supply will outstrip the demand. When everyone who wants a Python has bought one, the prices will fall and eventually stabilize.
I don't have much interest in Pythons, but I'll have to admit that I'm intrigued by the prices they're bringing. However, I'd sure be leery of buying one for an "investment". With buyers being as fickle as they are, that Python you thought was a great deal at $3000 might be a $1500 gun in a year or two.