When the Blockbuster in my old town went out of business, they were selling those placeholders for a nickel a piece. I bought $1 worth of a bunch of 360 games I owned, mainly for the one Left 4 Dead 2 they had. I was gonna buy just it, but got the others because they had a ton and a sign above that said "Great for Target Practice!" The cashier offered me a bulk deal on all of them, but I passed.
Also, I remember a few years back I wanna say Christmas 08 or 09, they had a littl display set out of N64 games for $40. All were sports, except Tony Hawk Pro Skater 3. My sister picked it up for me for my Christmas gift, lol.