I have 4 available asking $20 each so I'd like to think that's cheap

but I would have to check into shipping costs, my guess is this could be done in the order of $20ish. It's nice and light which helps, but not small which doesn't help. So I'm not sure if that makes it worthwhile for you or not, I can try to get an estimate for shipping.
It is a mogul socket which means it will fit any lamp with a mogul socket, 175w, 250w, 400w, etc.