How to place a quick offer when driving for dollar?

[Mo Muigai]

A townhome that needs cosmetic touch up has been on market for a while now and wondering maybe I will be the last one to place an offer. It’s next to my sisters townhouse so I’ve seen it on market for 6 wks. I toured in today self tour. Was wondering if there’s a way to place an offer quickly without really going through the whole process, I have no realtor as I live out of town. Planning to offer 80% market value