Good fortune has smiled on me and a Canon 6D body will soon be coming into my life. Consequently I've been contemplating buying a lens. I've noted that used and reconditioned Canon lenses are available through Amazon and, I imagine, elsewhere. The Canon EF 24-105mm f/4L is available at Amazon for $800. as a "used" "White box (New)(Bulk packaging)" item. At B&H the same lens sold in new factory packaging is $1150. I cite this just as a sample of the savings that appears to be available on good glass when bought used. (I don't mean this as a promotion nor criticism of Amazon or B&H; both of whom I've found to be reputable and fair in their pricing and service.) Does anybody have any experience buying used glass from Amazon or other sources? Any pitfalls or caveats to going this route?
Thanks for your help,
Andrew