I called the only Kmart within my area and sadly they didn't have Nier on the 360. =( It's the one game on the entire list I've been looking for cheap as I've heard great things about it. More patience on my behalf is needed for the time being.
Got an update! Unfortunately, I didn't get them to price match the $20 online credit but I did get them to give me free overnight shipping! Here is the email I received:
Dear ____,
Thank you for contacting GameStop.com...
I just emailed Gamestop about price-matching the $20 online credit for Red Dead Redemption as well as getting free overnight shipping when applying code DEADEYE. I will post my original email as well as their reply asap.