Did you try GoodYear itself?If you know where one is go in there and see if there running any specials.Allot of times they will run the $80.00 back by mail special for a set of 4 tires.Also most times they will beat anybody's price.So search the net for the price and take it to GoodYear and they will beat it.
That,or call them up to see if they will beat any price you saw on net.But keep this in mind,they will beat any price on the net that includes shipping.