seriously, you'll be $60 richer. What's the other option? You try to sell the whole thing, controls, games and board, on Craigslist for $100...or sell each piece one by one for max profit and deal with the hassle, the asshats and spammers, yada yada...
I vote take some money and keep a friend. You're not using it, man, give it a good home. Like a kitten! Wii is awesome, my favorite system in a long time, but I see Wii's used for $25, balance boards are $30. It's not an investment at this point, unless you're short on funds just make this a positive cash flow.
Give your bud a break, cash out, then go over there to play it with him, You win, twice! He might even give you a beer, so thrice!