I’m not sure if this is the right forum, but I just saw a Facebook marketplace ad for what appears to be 1.5x1.5 inch 80/20 for $2/lf located in Sutter Creek CA. The seller says he has~5,000 lf. Seems like a good deal for raw stock if you’re in the area.
https://www.facebook.com/marketplace/item/935044970029234/