For those lenses that have an Amazon Standard Identification Number (ASIN) the Show Lens and Show Lens Pricing pages will now display Amazon offers of new, used, and refurbished lenses. Due to the Amazon API, the shipping is not displayed in all situations, so make sure you check the details on the Amazon site (click through the prices to get there) before you make a decision.
Admittedly, I’ve never bought anything used on Amazon, so treat them like eBay buy-it-now auctions — there is a bit of risk involved. On the other hand, it never hurts to have other sources of pricing information and the addition of refurbished and new sources of lenses should be very useful.
If you have any comments or suggestions, let me know what you think!