How much can I list my 360 for?

I just wanted to know how much I can get for my 360, 360 games, and accessories. Also, I plan on selling locally, so no need for trade-in estimates. The things I plan on selling are as follows:

1. Xbox 360 Slim 250GB w/ all standard accessories (headset, power brick, etc.)
2. Two Xbox 360 wireless controllers
3. Xbox 360 controller charger cable
5. About 30 games. Most are probably worthless (Beowulf, Band Hero, etc.) but some include Halo 4, Skyrim, and Black Ops 2.

Another question I had was if any games stored on the HDD have any value, or if after my account is taken off, the games disappear. If they do stay on there and do have value, some included are Far Cry 3 and Minecraft. Any information would help greatly, and I thank you all in advance for taking the time to look at or answer my question.