My local grocery store sells a 4 pound bag of dried beans for $10 or so, which seems kind of high. Amazon basic beans are $1.50 a pound or so. But he's buying

My local grocery store sells a 4 pound bag of dried beans for $10 or so, which seems kind of high. Amazon basic beans are $1.50 a pound or so. But he's buying bulk coop beans, so it's cheaper? All the bulk coop beans I can find online are actually more expensive, like $3-$5 a pound.