I'm not aware of a machine of those dimensions that weights that little (52.35 lbs, one person could lift it). Looks nice.
Ignore their bundles. Friends don't let friends buy 3 mil bags. VacMaster for example makes a wide assortment of 4 mil bags. I own 6" x {8", 10", 12"} to minimize plastic waste and save effort; with the help of friends we're on second boxes of each of these. 8" x 10" is also useful, as is 10" x 12" and 10" x 18". My machines won't take 12" wide, and 18" is too long, I should have bought 10" x 16". Go big once your machine arrives, and you can measure first-hand what's possible. Like curtains, there's slack in the path. Insert a bag fully into the clamp past the seal bar, and measure how much more length is possible at the other end, to determine the maximum practical bag length.
Even coarse salt (e.g. Cantabrian anchovies) can pierce a 3 mil bag. A 4 mil bag will often tolerate bones. To be sure, cut open another bag to improvise those bone guards they sell separately. This is a great use for the 3 mil bags that come with a machine.