Sorry for not replying to the other thread to 
which I had replied earlier.  Anyway, you can 
tell a bootleg (Read: Illegal) dvd in a number of 
ways.
Product image - If it doesn't display a 
company logo, then it's suspect, if it varies 
from the original packaging, it's very suspect.
Languages - If it has only Japanese subtitles 
and no english dub, or maybe japanese and chinese 
subtitles, it's almost certainly a bootleg 
(unless it's a japanese dvd... which wouldn't 
play in your dvd player).
Regions - If it says "Region 0", "ALL 
REGIONS", or something similar, than it's most 
likely a bootleg.
DVD count - If it's 3 dvd's for 26 episodes 
(in the case of your esca auction), then once 
again, it's most likely suspect.
So you might be asking yourself... how do I 
buy legit dvd's on ebay or otherwise for a good 
price?  Well!  If you want to continue using 
ebay, use what I've just said, and compare to dvd 
listings at a legit retailer (Amazon, suncoast, 
etc).  If you choose to buy from internet stores, 
I highly suggest www.dvdpricesearch.c
om
If you wish to look further into such things, 
try this link.
Bottom line, support the industry you love! :D

---Fireye