Newegg, Amazon, mWave, NCIX US carries the GS, in Stock. On some very popular parts, if all carriers happen to be out of stock, the price is $0. Happens a lot with the Cryorig H7 and Raijintek coolers as only NCIX carries them. Sometimes it's just a screw up or lack of update on the part of pcpartpicker, been several times no price on an item, yet go to newegg website and the item is in Stock.