Generally speaking, I will buy Slave Waystones from anyone for HALF these prices [equivalent values since I don't necessarily have the same list, eg: low-tier BUR subraces = 3 Slave Waystones instead of 6]
In short, see me first; these feel way overpriced.
Poli also has 50x all items! Sell them to him so he can be only one to run limbo, no competition!
If someone sets prices unreasonably high, they will get undercut. That's how a market works.
Current Slave Waystone stockpiles are finite and you consume them at a much higher rate than anyone else (in two weeks you have probably burned more than the rest of the server over the last 3 months), so obviously I am going to make an offer too.