Also consider that even $600 for a Python was "high" just a few short years ago.
For the longest time, there have been rumors or assumptions that Colt would start making the Python again, but now that that's been put to rest, it's starting to sink in that "they'll never make any more Pythons".
Then start dividing up what's out there by condition and age, and the large spread of prices ($800 to $2000 to $$$) begins to make sense.
The legitimate "NIB" or "don't look like they've been fired" pistols are those at the top end, while the no-box shooters with wear are at the low end.
The most pertinent of what I just wrote is "they'll never make any more Pythons".
In just a few short years, remembering back when a nice Python sold for "only" $2200 will make a person recall the "good 'ol days" when Pythons were "affordable".
