LOL I had a bunch of those handheld Tiger Electronics games growing up, including Double Dragon and Teenage Mutant Ninja Turtles. I think I sold them off to someone for $3-5 each the one time, all except maybe a bowling one and TMNT.
Oh and as for mispriced games, I had a copy of some game(don't remember which), which was supposed to be $1.96 @ CC and when I brought it up to the register after having it PC'd in the dept, the cashier I got looked at me and called over a manager after it rang up $1.96.
It was marked for MUCH MORE(over $20 actually) and once she saw the price it was ringing up she gave me every damned excuse in the book as to WHY she 'can't sell it for that price'. I just told her repeatedly that it was their error that it was still out if it couldn't be sold at that price, so I should get it for that.
She was one stubborn b though, so I said '

it' and only bought the other game I had found(for $6-8) and was out the door.
Another time, I found a PS2 Sony brand DS 2 controller marked either $3.99 or $4.99 used @ Gamestop and since it was THEIR error for putting the wrong sticker on it, they let me get it for that price.
Plus, I've had numerous occasions where I'll check the availability of a game prior to hitting GS and if the sticker is out of date and lower, I'll expect them to PM their error, which they usually do. I've managed to get a couple games for cheaper than their current price that way, including the 2004 Transformers game for PS2(stickered either $7.99 or $8.99, rang up $12.99).
You just have to be firm in your reasoning as to WHY the lower price should be what you get the item for.