Question about an Off market duplex

[Kolton Gutierrez]

Below is what sellers told my realtor about an off market duplex I’m looking into: 

They said for an outright sale, they’d have to do $165k and you pay their closing costs, otherwise it wouldn’t make sense for them (we can talk about the possibility of me crediting a percentage of my commission to you if that helped your out-of-pocket since I would be getting both sides).

For seller financing, they’d need to get $15k down and finance $150k and that you would essentially own it and take care of any repairs necessary as things arose over time.

I would end up paying about 3K in closing. 
How would you counter? Or would you take the seller financing option?