Maybe a bit pedestrian....I have just purchased a used Nikkon 35mm f1.8 DX lens on eBay for $183 including delivery. This is satisfying because I had offered to buy one at a higher price but the vendor wanted to settle outside of eBay and I was not comfortable with that. I mean, who uses a site to advertise their goods and then tries to circumvent the original advertiser? Can you trust that person?