Buy it. At less than $1500, it's an absolute steal, and the prices are not headed south any time soon. You'll recover your cost, plus a profit, when/if you sell it.
I paid $1300 for a nickel 4" model last summer, and I thought I stole it. Nickel Pythons are a bit more rare than the blued models, so they bring a premium based on relative scarcity.
It a different experience shooting a Python, or any Colt for that matter. The action continually "stacks" as the trigger is pulled in double action mode. It's the nature of the Colt "beast".
As to stocks, there are any number of after market stocks out there which are superior to the 3rd generation stocks that are on your potential revolver. 2nd generation stocks are preferred by a lot of folks, and there are Hogues, Pachmayr's, and others. I have several sets of Herrett's Shooting Masters on mine, which I modified to fit my hands.
Downside to the Python, is that parts are getting scarce in the case of a repair. Even more scarce are competent gunsmiths. However, that's the case with a lot of older revolvers.