I'm toying with the idea of buying one of those vacuum-sealing machines. I'm hesitating because I'm not sure how much the bag/plastic refills cost. So, I'll throw the questions to the 'hounds:
How much does it cost to buy refills for a home vacuum sealer? Does this work out to be significantly more expensive per use than good quality ziplock bags? Are some brands of sealer more economical to operate than others?
Is there anything else I should know about these contraptions before shelling out for one?