Infor Re: Apartment Rental Rates

Hi-

I am an out-of-towner (West Coast) and am looking for some advice on rental rates. I have a three family brownstone in a tree-lined streed btw 5th and 6th ave in the PS 321 district. Each apartment is about 900 square feet. 6 rooms; three windows each end of the apartment. A hallway; eat-in kitchen; one medium bedroom and one small bedroom on each side of the apartment have windows, kitchen and living room have windows, and two medium rooms in the middle of the apartment with no windows- typically used as an office; dining room. Not exactly a floor-thru b/c of the hallway. There is some original detail-basic molding and trim. Wood floors. One apartment was totally redone with dw/wd and nice kitchen and bathroom. the others are not modernized and no dw or wd but have been recently painted. All tenants have access to garden and basement storage. Any sense of what is a fair rental rate? I have looked on craigslist, but it is so hard to tell from photos. Any ideas? Thanks so much!