average cost of onions per pound
1 Scallions or green onions are sold per pound or by bunch. 2  The average cost of a bunch can be around $0.50 to $1. 3  Some states sell onions per pound and the price can run from $2 to $3 per pound. 4  This makes the price of each bunch to be around $1.50 to $2.00. The same price range can be applied to yellow onions. 2  They also cost around $2 to $3 per pound. 3  However, there are times when their price goes higher. 4  Vidalia onions, on the other hand, can cost $2 to $5 per bag.