I've noticed here lately an increase in the pricing of vintage glass lens clearance lights. You used to be able to snare them off ebay, for little to nothing, now a nice NOS set will run you $100 easy. There's one guy I know of that advertises lots of vintage lights on ebay,at high prices, but doesn't seem to actually sell that much. i believe others are taking his lead, on pricing now. I sold a nice pair of Electroline N4s (which were the Cadillac of lights back then) not long ago for $50. I'm seeing them sell for over $100 a pair now.