I wouldn't accept anything below 200BD for it. Unfortunately the market is below zero at the moment. I have been trying to sell a 12-16 13^50 short sword for several months at 180BD with no luck so far... I recommend holding it for now if you can't find a decent buyer
In my opinion this beauty can fetch 150bds-230bds+/- Sold my 12-16 [17 below 50 (if i remember correctly)] forked sword for 150bds a while back And 12-16(13^50) butterfly for 180bds So I assume you could get something around that for your brute
Beware of the beast but enjoy the feast he offers.