I bought a Sigma 500mm from this company for £469.95. When I was checking through the prices and availability on their website, there was one available for cheap but was tatty and, according to the description, had dampness inside the lens. Obviously I avoided this one and spent a bit more on a better one. Why the company was selling a lens with damp in it is beyond me, I guess greed and shoddiness had something to do with it. When I got my lens, it was really tatty, had no box, the lock button didn’t work and it had a damp patch in it and had an intermittent issue with communicating with my camera. It took me almost two weeks of emails to finally get the company to replace my lens, they really were quite reluctant to be of any help and to send me a replacement. They even charged me an extra £10 for a better lens despite all the issues I had. Personally, I won’t be using the company again, they’re not particularly good at what they do, the customer service is unbearably shoddy and I’m guessing I got very lucky in getting a replacement. Avoid at all costs unless you enjoy a very poor customer service experience and poor quality products.