Shopping auction sites requires a few caveats—beware of designer knock-offs, check the feedback ratings on sellers carefully, only pay through secure options like PayPal. Once you’ve got the cautions out of the way, however, there’s the possibility of finding some truly great deals, even on items that are rare or one-of-a-kind. Also there’s the thrill of being the top bidder—if you enjoy that sort of thing (and we kinda do). Check out our reviews of these sites so you’ll know where to begin.

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