Ebay?!?!


Copies are available on ebay for about 20% of the normal price.  While I love a bargain, I am not looking to buy counterfeit; but kinda assume that if BitDefender doesn't demand the auction be taken down, they are probably okay.


And advice here?  


Some do not come with an authentication code, but are "pre-authorized".  What is that?


Thanks for your help.