I have a Foodsaver that is 10+ years old now and it has served me well. The bag rolls are the priciest part of the whole proposition. If you are vacuum sealing dehydrated stuff keep in mind the sharp edges of dried food can and will poke through the plastic. I recall using a sheet of papertowel around something dehydrated once, then vacuum sealing and that seemed to help.
Oddly enough I use it more now for portioning food from the grocery store. I will buy a bulk pack of chicken or something and divide and seal then freeze. Not sure if the time I spend portioning it out and the cost of the bags makes me ahead of the game money wise or not, but it makes me feel like I am, and to be honest, that's all that matters.