I buy from this guy but not through eBay, i have done for a while. they are all sent from a mate he has in the us. Can't remember off the top of my head what his reason was but it satisfied me at the ti e and he is legit.
More relisted now, although most are for bidding rather than buy it now.
Must have had a dozen or more over the past few months from this seller, every one has arrived the very next day and in superb condition.
For some reason the 'stamp' on the jiffy bag never seems to get overstamped by the post office, therefore I get a 'free' large letter stamp to reuse every time.