I bought my GC a week before they were giving out a free game!
After I had it for a week, I was searching for more game reviews, prices, and etc. I somehow stumbled on this site(the old forum), found out about the deal, and felt like I got ripped off!
I went raging back to store and told them I'm returning mine and buying it back with a free new game. At first, the store clerk was like he can't do it, then I told him to get a manager and there! I got my GC back with a free Metroid Prime.
Even without the promotion, I would have paid for the full console price of $150(which I did) and also buy Metroid Prime for the full price of $50(it was just a matter of time, I really loved playing the demo).
I'm glad I found this site and saved $50, anyway that was my little story.