Hey Bigger Pockets Community! 

I am new to investing and I am interested and buying rental property in Baltimore.   A real estate agent brought to my attention three rentals available for purchase that are already tenant occupied.  Met the owner who has also been maintaining the property himself.  I went to see the properties and it looks like work has been done in the property, but just the bare minimum.  There was new plumbing put in, new water heater and heating system, (but no central air). Laminate flooring on the first floor.   Basements are unfinished.  I asked him to provide copies of actual bills, copy of the current lease, and 1 years worth of tenant payment history.  (Nice guy, However, he does not strike me as the type of person who keeps records)  He said he does have led certification certificate for each property.  I met the tenants, and was able to talk to them, they said that they have been living in the unit for about two to three years.  On was an elderly lady who admitted that she has been late with the rent, but it was because she was sick, but she does pay.  He is asking 30k for each property.  

Questions:  

1) How do I determine the value for the property? 

2) Does anyone know of a good inspector and appraiser I could use in Baltimore City? 

3) Is there anything else to consider in order to decide whether or not to invest in property?