I only got lucky once with a trade-in. Bought Wii + games totalled ~400, sold a week prior to Wii-U announcement for 200, bought a PS3 with 10% off. After Wii-U, all Wii's were 200 new, $60 trade in value.
Went to trade in about 10 PS3 Games, some hard to get like the original Monster Hunter, $5-7 tops.
Either way, they're a disgusting rip off, glad I didn't get employed by them.
(now hurry up and sell 3G Vitas for piss all because you're closing down)
I've also noticed A LOT of managers for these stores are both NOT gamers, know shit-all about games, and like Nekosan pointed out, are so narrow-minded. I remember one guy at EB as a manager trying to convince me to buy a 360 instead of my PS3 at the time. I said:
"I'm not buying it because it's a smouldering piece of **** made by microsoft, it's got hardware that's clearly expired years ago, you have to PAY to use your own internet on it, and is full of egotistical retards like yourself who believe the Xbox 360 is the only thing you should need. I'm buying a PS3 because I like the software, I like the games, and because people like you give consoles a bad name in general. Now either sell the damn PS3 to me or I'm buying it at <store name>"
Store B is a local Anime + Games shop. slightly cheaper then EB and GAME, MUCH more friendlier staff. He got butt hurt and gave me 10% off and threw in FF 13 also. >:3