I have some Pythons. You don't say what you are looking for? Blue.. Stainless..
!st. 2nd.3rd generation? 2 1/2 - 4-6-8 inch barrel? .357 or the .38 target model.
And lastly what are you looking to pay? Original box paperwork and grips will add to the price. For nice blued ones in good shape they tend to run between 2-4K depending
on S/N and a few other things.