Buying and selling a property without a Realtor?

[Samuel DeMass]

I had a seller contact me, knowing that I buy rental houses.  It's in an area I know well, and can probably work a deal that will work for both of us.

How do we go about finalizing the transaction when we're done negotiating?

What's step 1-6?  Who should I contact?  My experience has been going through Realtors, but in this situation, saving both parties the marketing expenses is key to make the deal work.

Thanks for any insight!