How do you approach probate lead?

[Isaac El]

I found a house that looks vacant (it is severely distressed) I looked up the property owner and I see they passed away.  After doing further research I found some relatives.  What is the best way to approach this when you call them? I called a similar lead like this in the past, told them I am sorry for their loss and have they thought about selling the house? and they totally flipped out on me.  Any advice?