I have some McCoy pottery, but the value is definitely lower than it use to be some years ago. The blue bird bow knot G667 is very rare and it is difficult to find information pertaining to the value. With that being said, I can tell you that the basin & pitcher sold for $209.99 in 7/2017 (Ebay). And the only piece I could find was a chamber pot & lid which sold for $69.99 in 4/2016 (Ebay). I wish I could tell you more, but hope this helps a bit.