We paid 140 euros for a 2.5 hr tour. Our plans worked out well; arrived to Or into in the Am and explored the weekly market (mostly grocery items), went to the darling local shops while they were open, had a leisurely lunch and then did the tour after lunch while a number of shops had closed for the afternoon break.
She was very flexible with plans, especially since one of our group was not very mobile. She would provide information and then those of us who wished to see the subject could walk to it. She also met us at the restaurant after lunch, which made it easy to find each other.
She showed us the market area, the 4 quadrants of the medieval town, some fantastic local artisans with good prices (especially the olive wood carver), the sights along the city wall edge and then an in-depth visit to the duomo where she explained the artwork, etc (we paid the minimal duomo entry fee ourselves).
Orvieto is not a big town but we gained so much appreciation and knowledge from “seeing” it through Manuela’s explanations. There is a reason that, from all the local guides, she was the one that the city asked to take Rick Steves around town.