PBP,
I had great luck buying my Python on-line at Guns America. 99% blued finish - absolutely gorgeous. I'm currently looking for a stainless.
I know people who don't like to buy a piece without actually inspecting the piece, but I've had great luck both times I've done it. If you Google the person or business you're buying from and contact them directly, you can get a better feel for the deal as well as the condition of the piece.
It is a buyer-beware scenario (what isn't these days) but there are some great deals to be had as well as rarer pieces to be found.
P.S. bac1023 those are some BEAUTIFUL revolvers. Nice job on a killer collection!