Are these contract prices really "per onion"? Or are they actually per pound or per kg? Up to $9.39 seems very expensive if it's really the price for a single onion.

I thought maybe they're some sort of special exotic onion variety, but I don't see anything to suggest that.

They are per (normal (sometimes organic) yellow) onion. Prices vary.

(It's primarily a novelty/art thing. But I do actually deliver the onions.)