How do I Buy an Off-Market Deal that I Source Myself?

[Jack Barkow]

The title is a bit open ended, but what I am referring to is the following as mentioned in the BP podcast on many occasions.

Browsing unit listings in my target area and cold calling the person that listed the unit when it seems like a self-managed property.  Going from there offering to buy the property and solving their problem of not wanting to be a landlord.

Assuming that the owner is interested in selling and after a walkthrough of the property a price is agreed to.  Then what?  Can I just use a purchase contract from the fileplace on the site?  Do I just pick wherever I want to do the closing at and be done with it?

Up to this point I have worked with an agent that has their standard offer contract that they use or wholesalers that send out the contract that they want used when sharing their off market deal so the DIY approach is new to me and I don't want to make a costly mistake.  Any advice is appreciated.