I have been looking into Canon's older 28-80mm USM metal mount lens. I have heard that it is a very good lens for the money, but when I looked for it on eBay, the only places that seem to sell it are from Japan.
Here is an example of the lens I am talking about: http://www.ebay.com/itm/Excellent-CANON-EF-28-80mm-F3-5-5-6-USM-/121642460981?pt=LH_DefaultDomain_0&hash=item1c5274a735
Even though the seller has 100% positive feedback, are there things I need to consider before buying? I have noticed that a lot of lenses from Japan are noticeably cheaper than from USA sellers. Is there a reason for this?