I'm not sure about the -99 or -200, but prices I know are:
-400 is 1.4mill (just bought one, but saw someone yesterday asking to buy one for 2mill )
-600 is 1.6-2mill

I've heard -200 is 600k, but it can be up to a 1mill.
Prices vary because some people resell higher..

And for the -99, you could just get a shadow pestle --> 25k

Hope that helps. (: