Why would you put 10 properties in one listing?
Are you trying to due a bulk sale? If yes, are you willing to leave behind some equity?
What are the property values?
I know, I know more questions and not many answers.
To get an idea of the values as-is you have some options:
1. got to Real Estate Values.us
2. contact local real estate agent
3. hire an appraiser
As an real estate investor, we are always looking to purchase bulk properties but we would need more information.