I bought 200 bags earlier this year for about $.13/bag. I think 1qt Ziploc freezer bags are about the same price. Between buying in bulk, freezing leftover BBQ, and sous vide, our 10 year old Cabelas vacuum sealer gets regular use. We had a Foodsaver brand before that with the roll of "bags" that required you to make two seals for one bag. Damn thing and the roll never worked right and it was returned.
In the hierarchy of small electrics in our kitchen in terms of use, first is the Breville Smart Oven, second is the Vitamix, and third is the Cabelas vacuum sealer.