How to price offers for off-market deals

[Eli Kallison]

I have been running into the issue of not knowing how to price offers for off-market deals I find from direct mail campaigns. 

I am operating in a market with a very heterogenous real estate landscape in a relatively small county, so comparable sales data from Zillow, Realtor, etc is a little finnicky. 

Does anyone have a strategy for how to price offers? I am hoping to send some blind offers in my letters, and I want to develop a good system for determining price.

Thank you!

-Eli