I have found this website useful for info about Nikon products: http://www.photosynthesis.co.nz/nikon/index.html. Maybe there is something similar for Sony.
There's a big advantage in my mind buying from something like this forum's members. Especially if they are well-known. They will give you the history of the lens or camera, where it was bought, issues, etc, I believe.
I've only bought a couple of used items, but I factor in a service to the total cost I'm willing to pay. My upper end this summer was $2400 for a used 500mm PF. I paid $2000, the lens needed $300 of service, and I paid for insured shipping (another $100). I took a chance on whether it was gray market because the camera shop I bought it from couldn't say for sure, but I was pretty sure it wasn't. That same lens is now lower in the used market.
The price paid should reflect a couple of things. First, you can/will pay more than what a dealer will pay the seller in trade-in. But, the seller should sell for less than what you'd have to pay at a dealer. It's a win-win, if done carefully.
If you are buying used, you can always call Sony or Nikon, Canon, etc and see if they still service the camera or lens (if an older model). At some point they may not. Others may have more experience with this than I. The Nikon service website will allow you to input a model and serial number and give you service options plus costs for standard service. Anything else they find is extra.
Good luck, Alan
There's a big advantage in my mind buying from something like this forum's members. Especially if they are well-known. They will give you the history of the lens or camera, where it was bought, issues, etc, I believe.
I've only bought a couple of used items, but I factor in a service to the total cost I'm willing to pay. My upper end this summer was $2400 for a used 500mm PF. I paid $2000, the lens needed $300 of service, and I paid for insured shipping (another $100). I took a chance on whether it was gray market because the camera shop I bought it from couldn't say for sure, but I was pretty sure it wasn't. That same lens is now lower in the used market.
The price paid should reflect a couple of things. First, you can/will pay more than what a dealer will pay the seller in trade-in. But, the seller should sell for less than what you'd have to pay at a dealer. It's a win-win, if done carefully.
If you are buying used, you can always call Sony or Nikon, Canon, etc and see if they still service the camera or lens (if an older model). At some point they may not. Others may have more experience with this than I. The Nikon service website will allow you to input a model and serial number and give you service options plus costs for standard service. Anything else they find is extra.
Good luck, Alan