If you don't know what a "chamber" vacuum packer is please look into it before buying a new vacuum packing machine. The previous post mentioning "dougcare.com" is an excellent tip for supplies and general information about food processing. The chamber style machine are quite expensive but boy are they worth it. I have the Foodsaver and also a commercial chamber machine. No contest!....The tip about drying things prior to sealing is a good one..that really makes a big difference...any liquid in the bag will be sucked towards the seal point and sometimes in a chamber machine the water will boil.