As you can see by the gap, I'd prefer she buy me out. 

Its really personal preference.

And should I continue making these offers through the message box on the realtor.com listing or is there a preferred method of doing this?

I found an older tax lien was paid by another individual in Arizona and am thinking that she must be the heir.

Preferably from Pennsylvania. 

I found multiple private lenders (individuals) by going to local real estate Meetups.

Just seeing if there is any preference out there for rental property owners so I only have to do this once. 

@Ritch Bonisa when you say dnt market using rehab cost how would you prefer to market give example if its ok

She is a realtor who works a great deal with investors and runs a Hampton roads investor's meet up once a month in VA Beach, and we have a small group of military investors that meet up separately to network, syndicate, and help each other out with our individual goals.  

Specifically, I am likely looking to rent it out to Section 8 tenants, so a company with experience dealing with Section 8 agencies and tenants would be preferable.