I would not be without mine - I've had it about 5 years now. I used to use it for fresh meat from the market, but that was more costly than wrapping the package in foil for freezing, because we used it pretty quickly anyway. Once you have it, you will find it useful for lots of things. I hardly throw any food away anymore - freeze a meal leftovers with no freezer burn.
We have a friend who shares some of his venison, fish, etc. and it's usually stuff he froze last year, but you'd never know it because it's foodsaver bagged. I think the biggest money saver is for cheese! I haven't had a touch of fuzzy green in 5 years.
Also, this year I learned you can vacuum bag whole raw tomatoes (+ peppers, etc) totally fresh from the vine and they are just fine for cooking. It's also great for resealing ANY kind of bag - chips, noodles, etc, except you just put the bag edge on the heat sealer, and not into the well for sucking out the air.
I used a Daisy Seal-A-Meal (forefront to the Foodsaver) for years and actually still have it in storage somewhere. I have purchased replacement bags for that too, but they didn't VACUUM.
Foodsaver bags are spendy, so I did alot of checking for alternatives. The trick of the vacuum seal - is that there is one side of the bag that has a kind of waffle weave to it and the other side is flat. That makes the vacuum seal.
Ebay always has them.
Here is where I have bought mine lastly - www.alamoholly.com - item # MR-0810 - 100 quart bags are just $24.06. Shipping is a killer though. Next time I'll try and haggle that down. They ship UPS ground but seem to charge overnight shipping, LOL.
I noted in Cabella's catalog they also sell generic foodsaver bags for less, but I haven't tried them, but their shipping is cheaper.
http://www.cabelas.com/cabelas/en/templates/index/index-display.jsp?id=cat570002&navAction=jump&navCount=1&cmCat=MainCatcat602009&parentType=category&parentId=cat602009Alamo Holly bags work and they have lots of sizes.