I am about to grab a PS3 at a crazy price in a few minutes.
The "older" stuff is gold. Bundles are sold at crazy low prices most of the time.
If looking for a PS3 or XBOX 360 bundle, look at all the games and put their value at $5 each. It doesn't matter if its GTA 5, TLOU...whatever. $5 and make sure they all have their original cases, not some gamestop cases either
If that number is lower than what the person is asking for, just buy it...you will make your money back easily without even selling the console. I have never had anyone bother me for a $5 game, they just buy it and KIM. If the price is higher than the $5 per game price, get him down to whatever the cost is @ $3-4 per game (depending on the games). Then you can just sell the console lower than everyone else for an easy profit. If they have extra controllers that is even better.
Avoid Rockband and those damn guitar hero games...nobody wants those anymore. Sports games suck for reselling the most part too, but I am sure you knew that already.