Just got back from raiding my Gamestop. The Gamestop chick who was helping me didn't know about the 50% off. Thankfully, a fellow employee was in the store (but not on duty) and confirmed the deal. She had to ring up the discounts manually, which took a while since I bought a lot, as you'll see, but it all worked out in the end.
Here's what I got:
Used Games:
NCAA Football 2004 (complete): $1.50
MLB Slam (card only): $1.50
Splinter Cell (card only): $1.50
What's funny is that the zip search on the site has been showing these used games in stock for months, but whenever I've asked about them, the guys behind the counter would look each other funny and say, "I don't think we have any used N-Gage games. Nope, we sure don't." And whaddya know? There they were, in the drawer next to the new games, the exact titles I've been asking about. Dummies.
That said, I probably overpaid for MLB Slam, but hey, it's only a $1.50 and I didn't have it. Splinter Cell is too good a game to pass up for $1.50, whether it's complete or not. And a complete copy of NCAA has to be worth $1.50.
New Games:
X-Men Legends: $12.50
Worms: $12.50
Ghost Recon: $10
Roots: Gates of Chaos: $12.50
Requiem of Hell: $10
King of Fighters: $10
Chaos Theory: $12.50
Glimmerati: $12.50
and...
Xanadu Next: $10
(*Holds up copy for Sarang to see*) Who's

in' joking now, pal?
Kidding aside, they only had one copy of Xanadu or what I would've bought a copy for Sarang and/or whoever else wanted one. In fact, they only had one copy of all the newer games, like Glimmerati, Roots, and Chaos Theory. I think I also got the last copies of X-Men and KoF.
In all, I'm pretty happy with my take. Sure, I probably paid too much for Requiem, Roots, and maybe Worms, but I wanted them for my collection so I decided to pay up. I might keep those sealed for a couple of weeks in case EB suprises us with some deals, though it's unlikely. EB had Requiem for cheap very briefly a few weeks ago, but none of my local stores had it in stock. EB's site is pretty depleted of N-Gage stuff right now, and I doubt they're working very hard to replenish it at this point.
I have another Gamestop a little farther away that sells N-Gage stuff, so I might try them tonight. According to the zip search, they don't have much, particularly the newer games. But it doesn't hurt to check.
Good luck.
-DM