Buying Used

[docphotog]

Hello and happy Saturday! I was just wondering if anyone knows of any good places to buy used or refurb lenses in NYC. B+H and Adorama have a decent selection (especially the latter), but if you know of any other lens stores (online or otherwise) I'd really appreciate it!

I'm a little hesitant about buying it off of someone on craigslist or ebay but if you have any tips for not getting scammed I'm all ears!