How do I get vacant house owners to contact me?

[Barbara Cordon]

I need help with ideas for vacant home owners to contact me. I have clearly identified vacant houses where there is definitely nobody living. I have found the owners and contacted them through emails and letters I personally sent.  Nobody has gotten back to me. Why would a property owner who has a run down house not want to sell it? I mentioned in my contact that any property,  any condition, no repairs needed . Can anybody give me any insight to this? Much appreciated!