I was just browsing eBay as I usually do with no intention of buying anything when I saw that some people were already selling second hand copies of DC Universe Online for PS3.
Now this is an obvious problem for people not familiar with MMORGs because once someone enters the activation code into their PS3, it becomes locked into that account forever, and becomes virtually useless to whoever buys the game after wards.
So just a fair warning to everyone, I'd stay away from buying this particular item off of eBay just to save a few bucks.
'Nuff said!