Mass Effect Bring Down the Sky DLC on Sale

Cheap Ass Gamer has noticed the Bring Down the Sky DLC for Mass Effect is now available for 80 MSPs, which translates to one USD, down from its original 400 MSD price.
Whether this is a permanent or temporary drop in price is not immediately clear to me, but it seems a good a chance as any to nab it.

Thanks Joystiq.