I have been trying to get drywall installation quotes for an older home. So far, I've received two - $4500. and 7,000. So, I'm thinking the $7,000.00 quote didn't really want to do the job. How do you know what's a fair price? I live in the Richmond, VA area. Is there any average, "ball park" price? Or is it just an average of all the quotes you get?