I have a neighbor whose house I have been eyeing for some time because of how run down the property is. I’ve never met him before, but I found out today that he recently passed away. If I was still interested in this property, how do I find out when or if it becomes available and who would sell it?

Hi David! I found this article that may be somewhat helpful in understanding the process that happens after someone dies. Good luck.

https://retipster.com/deceased...

Look at his obituary to learn who his family is. Contact them (Facebook works well or you can try and locate their e-mail address(es)) and a week or so after the funeral send them a message. 

Or if you see anyone at the property go over there and introduce yourself!

Request a copy of the death certificate from city public offices. Whomever filed it out will be your first point of contact.

If there is one on file research if administration for probate has started,,

@David Evans the advice @Karl B. gave can work well, In addition since you live next door I'd keep an eye on the house and introduce yourself to anyone that comes to pack up the items at the property (if the happens) get a sound strategy for approaching the family of the deceased, probate can be touchy based on the emotional state of the heirs. Here's a great article from The Balance that breaks down how to get probate lists

https://www.thebalance.com/loc...

@Vaughn Smith Thanks! That’s a good article with some good advice.

@Joshua Saunders Thank you!

“ I’m a neighbor you never met .Sorry about Dave I’d bet he was a great guy , hey by the way can I buy his house cheap ... cuz ..mean it is pretty run down and whatnot and let’s face it he won’t need it anymore “

@David Evans, the article posted above by @Vaughn Smith , titled "Buying Real Estate from Dead Persons"  does a good job of covering the typical scenarios.  In the very rare instances, where the relatives of the deceased owner(s) can not be found, it may also be possible to simply assume possession of the property and start using it as your own, as is discussed here.  

https://www.biggerpockets.com/member-blogs/12388/86773-renting-real-estate-without-the-owners-consent-isn-t-that-fraud

Do be aware that taking over real estate which has been abandoned is a highly specialized real estate activity.  Being successful requires considerable research.   Best wishes.