EDIT #7:  They're back at $.15!  Hurry, they go oos quickly...
EDIT #6:  They've sold out again... keep watchin' 'em... They'll probably be back..
EDIT #5:  They're back at $.15!  Hurry, they go oos quickly...
EDIT #4:  They've sold out again... keep watchin' 'em... They'll probably be back..
EDIT #3:  They're back at $.15!  Hurry, they go oos quickly...
EDIT #2:  Okay, first off, the packs are back at $1.02 (after "BIGSALE") and (currently) in stock.  Both the price and the instock status tend to change - a lot - so it's worth keeping an eye on these.
Second, they're not at all like what I described (or like the picture shows).  The cases are about the same quality/plastic that the original GB cases were made out of and they have the same *basic* design with one major exception - the cases are about a quarter of an inch bigger and designed so that they can hold two GBA games.  This means that there is a little wiggle room in the case for GB/GBC games, but they still fit well and I still reccomend them - especially at this price.
EDIT:  Hey, the cases are back at $.15!  If you're interested, hurry, they tend to go fast!  (Don't forget to use the code '
BIGSALE' when checking out to get the discount!)
Hey, I just wanted to pass along a great deal that I found over on CAG!
EBGames.com has an 8-Pack of GameBoy/GameBoy Color game cases for $3.41.  If these are the same ones I bought a few years ago at Wal-Mart (and I'm almost 100% certain they are), they're great quality and (aside from the colors and lack of a Nintendo logo on the back) they're exactly like the cases that we used to get with all GameBoy Games once upon a time.
Here's the kicker though.  When checking out, use the Coupon Code "BIGSALE" and you'll get 70% off!  8 Great cases for $1.02.
Now this isn't as good as the price that was on them over the weekend ($.49, or $.15 after "BIGSALE"), but this is still a great deal - and if you're like me, you've got tons of GB/GBC games that could use some cases.
Sorry if this sounds too much like SPAM - I promise I don't work for EBGames or anything... 
 http://www.ebgames.com/ebx/product/191570.asp
http://www.ebgames.com/ebx/product/191570.asp