Multi Family valuations

[Gregory Massi]

Hello Bigger Pockets - I am looking at buying this multi family in southern Connecticut and I am having  trouble determining a proper valuation. It is a three unit and is located in a very good area -walkable to stores and train station. Problem is, there have been no three unit sales in that particular area (ie village) in the last year.  Should i base my valuation on duplex/single family sales? I would assume that the price per sqft would be more for a three unit?? this is my first multi so i would appreciate any help. Thank you!