What more do I need to evaluate this triplex ?

[Joe Gilroy]

I am a beginner, andI want to learn how to invest in either duplexes or triplexes.

I found a triplex offered for sale, and have some info, and I am sure I need more info to properly evaluate this investment. I want to buy and hold, and get positive cash flow each month.

listed price is 129,000

3 units

gross income is $2300 a month

property tax - estimate is 1612 per year

hazard insur - estimate 1200 a year

location is Stockton, Ca
built in 1977

does this seem like a good deal ?

and what more info should I get to make a good evaluation ?