Well, I see your reasoning jackdbum. My guess? I'm sure everything will work out fine. However, I see only one potential problem: this board is watched.
Just make sure you sell to somebody with high ratings and check their feedback. Because a company (say... Microsoft) could bid on your XBox and then get your address. Granted, this is a very paranoid worst-case scenario, but it is possible. Not likely that they would bother with a lone modder: I'm sure they are much more worried about, say, the entire modding scene. I was just throwing that out there.
But, as I already stated, I doubt this would ever happen. I'm sure your auction will be okey-dokie, and everything will we cool. God speed!
- Greg