I looked at the ad on Ebay, and it almost seems legit. The seller lists this as something he bought and it wasn't the right size that he needed. If you look at the "other items seller has listed", you can see 4 other packs he has listed also. He has 100% satisfaction on his feedback, but if you look at the 57 feedback results, you will see everything he has sold is all backpacks. SO is this guy someone who has a fetish for backpacks, or is it "counterfeit" items he is selling? Could be legit though. I have had to use the Paypal guarantee three times in over 6 years, and got my money back within 7 days. You are protected if you use Paypal, but as always:
Buyer beware !!