A set of four used winter tires. Cooper Weather-Master S/T2 225 /70 R15 100S (http://us.coopertire.com/Tires/Winter/WEATHER-MASTER-S-T-2.aspx).
They have been driven on for two winters, and have approximately 6400 miles on them (receipts from Discount Tire available).
Asking $50 each, or best offer. Please contact Ben at freeben@fnal.gov.