Okay, I have two 360s ATM. Both different serial #s on the casing/stickers but the same serial # on the mainboard. Long story, I can explain if you want, but all I want to know is what will happen is these consoles log into LIVE at the same time? Will the second one that tries to log on get booted off? Will the gamertags that were used to log in be recorded and banned? I want to sell one but don't want to be dodgey and sell a potential banned one.