3.2 is not just available for sale, there are still 3.2 bars in Minneapolis as a relic of a law from 1884.[1]
3.2 is the only beer that can be sold in grocery and convenience stores (grocery stores have separate alcohol stores that sell higher content beers, wines, etc.). From the article, CO, KS, OK and UT also sell 3.2.
[1] https://www.startribune.com/last-call-for-3-2-beer-bars/2034...