Sent Letter to Possible Motivated Seller

I noticed a beat up house in my neighborhood that has been rented out is now vacant. I looked up the owner in the county records (online) and saw that he lives several states away (in Md). Great!

Sent him two letters/flyers in the past month. Have not gotten a response yet.
He has owned it for 15 years so there is a LOT of equity...
Wonder if I should call?