Since I do all types of woodworking, I also subscribe to Lumberjocks.com. I had heard there about a way of saving $ that I used yesterday to my advantage. It was time to replace my old, noisy air compressor with a new one. I shopped online at both Lowes and Home Depot to find comperable units and settled on a 60 gallon, 230 volt unit. When I went to the stores I took along a coupon printed from Harbor Freight offering 20% off any single item. I asked at each store and Home Depot agreed to match the offer. That saved me abouut $90 off the cost of a $458 tool, just for asking. Individual stores may or may not comply, so ask for a manager and show the coupon which is readily available online..