Oem-type wheel nuts (from the bulk stock), I pay $0.95us each from my local supplier. Oem wheel studs are around $1.25 each now.
The closed end chrome, "acorn" pattern 1/2"x20 wheel nuts normally used with the typical cast aluminum aftermarket wheels are $20>$25 for a set of 20, price depends on the actual style, if "anti-theft", etc.