Vacuum Packaging. Anyone using it?

Our items are inexpensive and soft and "squishy" so we have been thinking that this might be an easy way to make sure they will always fit inside the thickness requirements for AP. Sometimes if not compressed they kind of push the 20mm thickness limits for large letter packages. So far we have been pinged on a couple and have had to wear the fee.

 

Anyone have any experience using these cheaper (under $100) kitchen food sealers?

 

Are the bags very expensive?

 

Any thoughts or advice on these machines?