This was recommended on Lonely Planet. I walked in trying to discover what "Sienese sweets" were,…read moreand I immediately smelled something reallyyyy good. I told the nice lady I wanted whatever I was smelling, and she pointed to the sugar-covered panettone. I was able to get a quarter of it instead of the whole thing. The price is weighed by kg, so my quarter was about €4.50 more or less.
Easter was coming up, so she was also selling colomba pasquale. She also had panforte, freshly baked ricciarelli, packaged pastas, pasta seasonings, and other oils.
I tried to pay with credit card here, but she insisted on cash. My total was under €15.