I've joined the 5D club! - need advice on 7D

I just got a 5D (full frame !) from my wife for Christmas (which I cannot play with until Christmas )!.

Anyway I'm faced with a dilemma that I need advice with: The cost of the 5D being quite high, I'm seriously thinking of selling a few things. This is what I own right now:

7D + 17-55 + 10-22 + 50, 1.4 + 24-105L + 70-300L + G1X + g12.

My thought is to sell the 7D, 17-55, and 10-22.

My questions are:

- Is it even worth selling? I just don't want to take a huge loss.

- Should I keep it as a 2nd body for aviation, sports events (which I hardly ever do)?

- If I sell, what should I ask for the 3 items?

- and lastly, where is the best and safe way to sell?

By the way all items are as good as new as I am very meticulous, and I'm ashamed to say that the 10-22 was used for maybe 20 shots.

Any advice?

I have also posted this on the 1D, 5D forum.

--
Chris