Widely available although not commonly so. Hard to find without chips but chipped antique ones still fetch good prices. You can often find new ones in any good handle shop although not usually very nice. Mostly just plain. Waterford made them too but those would be very pricey even if they showed on the second market. Prices range from around 100 to two or three hundred, same price range as the paperweight knob ones for the most part, more for good antique ones. Although you might find the odd one on eBay goes for less. Vasart ones are the rarest buit also had the nicest brass parts, Strathearn did some in a yucky white metal and brass coloured as well as brass and the PP ones are all in a gaudy modern brass.