Screw the consoles. You could probably fit about 5 ps3's in a trolly. I'd run out back and grab handfuls of Xbox live membership/points and PSN currency cards that are £20-40 a pop and the stacks of MW3 as there is more than likely a huge stock holding and they hold their value. Have no problem selling those on ebay or trading them back in to the other GAME store around the corner lol.
Xbox hardrives would be another.
Damn you are thinking! This is the way I would go, then the games...screw the consoles.