Recently a gorgeous Meiji ivory Japanese kushi whose intertwining dragons had diamond eyes did not sell for $400. It has the typical Meiji characteristic of the carving folding over the top of the comb. You may refer to auction #270224867132.
There was also a complete set of what I think are 10 Edo ivory combs, decorated with gold inlay, to wear, and also cleaning items like a shoe horn and a tooth brush. Some teeth were missing on the combs, the gold inlay is worn on some combs, and it belonged to a famous NYC fashion designer. I have never seen anything like it. It was selling for $1295.