i may just be weird, but I have always been kind of against buying helmets off of ebay. They actually arent supposed to sell them like that because you could potentially buy one that was used, and the way they are designed, if someone takes a fall the inside fill of the helmet will break, but the outside may look perfectly fine. I know that at all of the consignment tack shops around here, they can't sell helmets because of that. Just something to think about :)
I heard that as well! Never buy a used helmet!!! Used saddle, tack, apparel....A OKAY!! NEVER a helmet!!