Been available *3* times since they first started listing it, as far as I can tell - and "quantity one per person" with a 48 hour timeout - and it's ALWAYS been out by the time the timeout expired.
 2 of those 3 times it sold out in LESS than an hour, the 3'd time they actually had them in stock for a bit over 1 day (which is when I managed to get mine).

 Most of the time the lowest-cost RX 4570/480/570/580 cards they have IN STOCK are over $300.