I don't know how the returns work at Costco, if they keep them in that same warehouse, but:
I just returned my Acer TMC104 w/ dvd-cdrw yesterday to the Costco in Richmond, VA. Used it since September 03. If they do open box items, you can probably get it at a discout. ONly thing messed up is the plastic latch holding it together when it closes has broken off.
Just letting you know for anyone in the area.