Hope you also sell higher server power supplies like 1200w
and ship worldwide :3
I am starting with the 550watt PSU because I have a good number in stock and have been using them for a good while, so I know their resillience and inherent value, but should there be substantial demand for the higher wattage ones, then I can see if I can source them in bulk to keep pricing reasonable.
Shipping world-wide can be an issue with server PSU's as postage can render the price un-competitive. Also, being 2nd hand, returns would be expensive / prohibitive, defeating the savings to be derived from server PSU's .