Depends on the materials. Would love to get my hands on a Bubinga or walnut combo. Normal combo shell (depending on condition can range from 200 to about 250). It has been a while since I have seen one. Not sure what a new one goes for from Mesa.
Perhaps I should go back into the threads and search for my conversion post. The shell may have cost me a bit more than what I stated. Perhaps $245. It has been a few years since I converted from head to combo.