You're buying theStarTech PC Power supply 300 -Watt ATX Replacement Power Supply.I bought this for a machine, unfortunately on arriving I noticed it wasn't the right size for the form factor in question. As far as I know, the seller that I purchased it from said this was in "like new" "open box" condition. It should plug and play. Check the attached pictures. If you have any questions don't hesitate to ask!
Shipped with USPS. Note that the specific shipment type is subject to change based on most economic options available. Also, please note that the seller is partially disabled and there may be time delays for shipping. Again, if you have any questions, don't hesitate to ask. I try to get back to everyone ASAP.
Happy shopping!