Distressed Property on Zillow - Contact Agent?

[Kate Purse]

Question for the experts!

I have found a property on Zillow I am interested in making an offer on.  It is a major fixer-upper listed for $175K on prime real estate.  I ran the 70% calculator and can offer 105k.  I did some research and the owner is delinquent on taxes and owes about 9K.  No lien yet, but I can view online statements and the notices threaten a lien.

 I have the current owners name and address, and questionable phone/email.  I have attempted to reach out by phone, but the person responding to texts says it's not him.  I attempted email, but no response.   The question is where I go from here.

Should I sent old fashion snail mail? Should I go ahead and reach out to his agent who posted on Zillow and go through them? I can do a cash purchase (I'd like to BRRRR the property) or seller's financing. Suggestions? Thanks everyone!