Here's why: last fall I got thoroughly ripped off by a halloween costume seller who took my money and avoided all consequences by sending me an envelope with a tracking number and nothing more than a wadded-up piece of paper in it. Because the post office had a record of the matching tracking number having been delivered to our address, paypal couldn't do anything else about it. Mail fraud or no.
In the long run, I decided that a $20 costume wasn't worth the expense of taking legal action

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And I'm with Zag... man, I'm too hard on clothes to spend real money on them! Target R Us!