They are on sale on Ebay right now. $286.90. I ordered a pair on 4/27/16, I got them by noon today 4/29/16. Here is the link.
2 NEW 275/60-15 NITTO NT 555R DRAG 60R R15 TIRES
2 NEW 275/60-15 NITTO NT 555R DRAG 60R R15 TIRES