Are small multi family (2-4 units) based on comps or cash flow?

[Marc DuLaney]

Hello fellow Bigger Pocket members. I am curious as to what my offer should be based on when it comes to small multi-family (2-4 units) properties. Should my offer be based more on comps in the area and  previous sales, or should my offer be based more on the rental income the property is producing or a combination of both? In my mind, I would figure the rental income the property is producing would have more weight with coming up with an offer but my realtor states it's more based on previous sales and comps. Can someone bring more clarity to this topic? Thanks a bunch :)