4-plex Offer

[Reese Thompson]

My partner and I are in the process of putting an offer in on a 4-plex.  Our agent wasn't too happy with what we wanted to offer, but we thought it was a good place to start.  We offered about 80% of the asking price which is the same as what the seller paid 10 years ago.  Our agent is worried that we're low-balling it and may not get a good response from the seller.  What are some of your strategies on how you begin offers for 4-plexes?  

I apologize for the lack of details because I don't want to put too much information out there while we're trying to purchase.