After reading (relatively) good things about the HOYA S-HMC filter here and elsewhere, I decided to give them a try. At B&H they're around $50, which isn't bad, but silly me, i don't like to pay more, if i can pay less. On Ebay the same filter is around $26 - yes, that's half - which makes me wonder whether or not they are a knock-off. Has anyone bought filters on Ebay, specifically from these Hong Kong dealers, that seem to always have everything and anything you need? Also, is there a way to confirm that it's an original Hoya? Special label on the package or something? Thanks.