I'm on my third food saver machine....and buy the rolls in quantity as a money saver. Bags are reusable, however, they do need to be replaced from time to time. Moving the bags around in the freezer can cause small holes which leaves the bags....almost useless....however, even those can be reused for other purposes. I use those for sealing insurance cards/registrations for ATVs, the boat, vehicles, etc. Also they are great to carry 'fire starter kits' when hunting/hiking/camping, etc. Purchased my first machine in 1995! Thanks