Motivated seller on apartment complex, how do I work this deal?

[Gary Dale McKee]

I have a pair of 24 unit, 2 bd 1 bath apartments found. The sellers are an elderly couple in poor health and have conveyed to me how badly they need to sell the property. It is to much for them to take care of anymore.  I have been talking with them for about a month now and they still haven't given me a solid asking price or any of the information I need to see if the property is gonna be a good deal. 

What should my next move be? 

Thanks