Direct mailing to make an offer on duplex

[Jonathan Morning]

Hello my names Jonathan in the Iowa area, well I found a nice duplex and it’s been vacant for 3 years now. The structure is still very good etc.. looked it up on the county assessors site and it listed asis 84000 have me the deed holder name and address. I do not know how to come at the owner with interest in buying said property, would like advice on what is a good direct letter to send to them to show interest,clearly they have not kept the property up at all due to high grass etc.. any advice would be helpful OH by the way I’m broke!! Would a seller/finance deal be possible