Reading the comments below, I am guessing that most people simply don't understand the terminology you are using. Ie you have to define what are:

1. Public service 2. Lock in a price 3. What are the prices (vs margins) 4. What's a starting price

I understand your question because I get regular bills from my insurance company that say "Doctor usually charges $1,000 for the procedure you had but we have negotiated price $100, so that's what you owe, as you are still below your deductible."