Carpeting at discount prices is often available at local carpet stores. Remnants from large rolls or carpeting left over from a construction project can often be bought at a discount at building supply stores. Major home improvement stores such as Lowe's and Home Depot list discount carpeting online.
Buying a large quantity of carpeting reduces the price sometimes. Habitat For Humanity Restores has donated remaining carpet for sale at a discount at times. Area carpets or rugs are available for sale at a discount on Amazon.com and Overstock.com. Check the clearance section of any home improvement or home decor store for discounted carpeting. Retailers such as Lowe's often have clearance rugs at the ends of aisles. Checking with store employees for carpeting remainders is a good idea as well.