well it's not completely sight unseen, assuming the seller is competent and has provided a number of quality pictures. And if they're competent and have a good track record as a seller, they're probably also honest (a few bad ratings will kill an eBay seller business). And if they're dishonest, you will probably be able to get satisfaction from eBay. And in the end, we're talking probably $20 or less at risk. And your time and potential aggravation of course, which you might value differently than I do. I'm super cheap and am willing to risk a lot of time/aggravation to save a few bucks :-)