Good find. This is pricing out at $583 on Kayak for me right now, which comes out to 2.8cpm for EQM and for non-elites, and 1.24 cents per RDM for current Alaska MVP Gold 75k elites like myself, which is probably cheaper than you could ever buy AS miles for during a sale. The best mileage run fare I've ever found on AS was 2.39cpm per EQM or 1.06 cents per RDM for MVP Gold 75ks, and this find of yours is definitely in the same ballpark.