Sealing The Deak On Off Market Deal

[Dylan Domingue]

I am working on purchasing my second investment property Multi. It is going to be a 3 Unit that I have found Off Market. Could someone please point me into the direction of where I could find information on how to make this happen. Any books or podcasts going through this process??? Lets just say I already have found the property and owner has agreed to sell it to me. Where do I go next? Appraisal? Real Estate Attorney? Trying to do this without the help of real estate agent but will get one if needed. 

Thanks in advance!!