I'm mighty lucky to have my copy of PDS. here's my story.
I got it from the local Toys 'R' Us for only $20, and it was the last copy at that. and this was when the game was just coming out! a friend of mine who manages the local EB (which is right across the road from the Toys 'R' US) had gotten the last ticket (like they used back then at Toys 'R' US) for PDS. he told me he was saving it for some guy, but it ended up that the guy never came to get it. so i got the ticket and rushed over to Toys 'R' Us. i enjoyed the game very much and as a result, my grades suffered ^_^ And the game is still in like-new condition!!