I don't use a food sealer, but you can buy vacuum bags with a little hand pump from Reynolds or Ziplock at the grocery store. GREAT for freezing cigars, I had to freeze a ton last year when I got visitors and it worked out great. Didn't have a single split wrapper or foot when it was all said and done. Just don't over vaccuum them, you can literaly crush the cigars if you go to far. Stop if you start to see wrappers getting wrinkled from compression.
High Vacuum has been used with some good sucess at killing bettle eggs in cigars by the industry, it dosn't damage the cigars at all, is more natural than chemicals and less likely to do harm than freezing. So everyone seems to agree that for short term at least you can't damage a cigar this way.
Never tried it for storage, but I've bought a fair number of vintage cigars and it's common to see these shipped in the cigar box, inside a vacuum sealed bag. So, I'm good with it, if those experts seem to think it's a good idea.
I haven't heard of anyone storing cigars in a vacuum for aging and from what I understand, you need the air as part of the natural process for it to work well.