sears is having a 70.00 rebate on a set of 4 michelin tires. I just purchased on Sunday so i know its still valid. Michelin is an expensive tire but its also a good tire and will be a smoother ride.
the exact same tire at costco comes out about 3 dollars cheaper per tire (taking in to account the 70 dollar rebate at sears) that's 12.00 for all 4. for 12.00 its not worth bothering a friend who is a member to buy it and it certainly isn't worth becoming a member and canceling.
sears also is having a 6 month no interest payment if you use the sears card.