GM just started their fall tire sale. Conti is $200 off when purchased with a GM card (also Bridgestone, Pirelli, Hankook, and Goodyear). Also, they price-match the lowest local price (Walmart included; I did it last fall). Why not go to them and get it?
I'm getting snow tires this month that way and it's a great deal. Here's the link:
https://www.mycertifiedservicerebates.com/
I did this last fall and the rebate was approved in 36 hours and I had the $200 card a few days later. I've never experienced a better rebate, and I really enjoyed the highly professional service at my local Chevrolet dealership (WAY above typical dealer experiences - North Bend Chevrolet, North Bend, WA).