The sales staff at this place is paid on commission, and they will tell you whatever you need to hear to make a purchase. I purchased a used tamron lens for $175 and was guaranteed by Niles that the used lens underwent a rigorous testing procedure. I asked all the right questions, however after taking my camera to the beach, the lens fogged up (proving it was not sealed and not tested whatsoever). A small hair showed up after this and ruined every picture thereafter. I am not an amatuer, and this was a sales job at its finest. Keep going to the next place if you're looking for an honest camera store.