Hey! I have a contact at The Source here in town that gets power supplies in bulk (450W dual-fans, 500W single-fan, and 550W single-fan setups). He's selling the 450W and 500W supplies for $40CAN, and the 550W for $45CAN. Any specs I should look up on the box to make sure they're actually worth buying, like the capacity of the rails, and all that? Sorry, can't remember the brand name off hand.