Sears, Roebuck and Co., Hoffman Estates, IL, and America Online, Vienna, VA, have been giving winter shoppers the option of buying AOL Internet service at retail. Sears shoppers can sign up for AOL at checkout in 860 stores and pay with their Sears credit cards. Those who do are entered into a $100,000 Good Life sweepstakes in which five winners (one awarded each month) get $100,000 and others receive a $50 sears.com gift card. Shoppers who link AOL billing to their card score an extra pack of coupons.