Question about 360

... And how much money does this monthly fee cost?

When I sold my 360 I formatted my HD after I moved all of my games to my newer 360. You probably wont get much for the console and all the games, I'd say just keep it. Digital media is non transferable to other accounts so just delete all digital media.

I called my local gamestop about a week ago with this question.

They offered me 55$ cash and 76$ in store credit.

You are better of selling it on your own.

you will probably get a bit more money if you sell it yourself instead of trading in. try using craigslist

Even after formatting/wiping clean a hard drive, the information on it can still be accessed by someone using the correct software. I doubt anyone buying a used console would go to such extremes though. And as previously stated, digital content is not transferable.

Here in the UK, 2nd hand 360 console are still going for good money as a lot are after the S model as opposed to the newer E model.