Been doing some price shopping. This seems to be the best price for a sealer - 15":

Harbor Freight

Using one of these should allow me to use the bags more than once hopefully.

And then here is an idea for a vacuum. I plan on using this, which I already own, and still using the O2 absorbers, but I wont have to use as many.

HF air vaccuum pump for R134a

If you remove the bottom its simply a little metal valve sort of devise with some threaded connectors. The R134 quickconnect comes off and I'm going out tonight to see if that's a common thread I can attach a barb fitting to. The other end attaches to your compressor line.