After all market value on these things is always volatile, and if you were speculating on games, you understood that. You got caught out? Thanks for your contribution to our capitalist world, brother. Better luck next time.
For my part, I'm going thank my lucky stars that GQD didn't have any copies of FF7 in stock these past few weeks and maybe use my hard earned eBay profits to get a brand new GBA copy of Super Puzzle Fighter II Turbo, now for the low-low price of $20.
One last note: I wish the Siliconera post pointed to some actual people who are upset with GQD. Without hard evidence, my tinfoil hat makes me think journaltisement.
I believe you mean Costco or Sam's Club moreso than Wal-Mart, which seems just happy selling a single burrito for 43¢. ;^)
If you're looking for people upset at GQD, just search around cheapassgamer.com threads. You'll find some silly 'games-are-collectables' folks spewing vitrol there. More to the point, you'll also find a lot of folks who claim GQD cheated them (damaged copies, etc). GQD may have done some gamers a favor by making 'rare' games easier to get, but it's really just a side-effect...they're in it for top dollar, just like everyone else.