A word of caution about buying gun show or Ebay barrels.
MOST of these were removed by amateurs without the proper equipment, and these are often damaged to the point of being unusable.
Also, many if not most were removed because something was wrong with them and the owner wanted to get rid of it.
In either case, you CANNOT always detect the damage until you try to fit the barrel to a gun.
When buying a used barrel, it's VERY much a case of "buyer beware".
And, finally, if you take care of your existing barrel and don't actually damage it with improper cleaning or by bulging the barrel by shooting it while it's obstructed, a Python barrel will outlast you by quite a margin.
In other words, unless you're planning on ruining a barrel, buying a new one is probably money wasted.
You'd be better off buying a couple a couple of spare bolts, hands, firing pins, and firing pin springs.
Those are the parts that will wear out under heavy use.
The reason I was wanting one is, I purchased this gun a couple of weeks ago and to me it is perfect condition. But the previous owner at one time installed a different front sight(2 pin) and when he did he drilled one of the holes a little crooked and low on one side. This is a very minor cosmetic flaw and doesn't really matter to me. I would probably never sell the gun but who knows 10 years from now what these things will be worth. So I was wanting the barrel as a spare to go with the gun if I ever did sell it. Which I probably won't and should just forget about it. Thanks