I've paid anywhere from $5.00 to $15.00 for the green ones like that around here. The most valuable part is the socket assembly that mounts to the shade because if that is missing and you have to buy it new it's probably $30.00. Wouldn't pay much more than $10.00 each for the green ones, but I have seen them sell on eBay for $25.00-30.00 so who knows?

C Cragg