Simple supply and demand.
Since the Chinese beer virus, people have been buying vacuum bags to cut up and use as face masks. This is created a shortage.
Also at the same time there was a shortage of n95 masks which were manufactured in a lot of the same places as vacuum bags.
These two things combined together every two prices of anything made out of spun polypropylene.
Bags still cost much less per year than going Bagless.
