@Jon Ankenbauer speaking from a lenders point of view, the seller carried seconds went out some time ago with most of the main buyers of mortgage loans.

Are you a first-time home buyer?  

At a macro level the owner is trading a higher price ($130K over appraisal) for favorable terms to you, the buyer (5% down and not having to quality through a bank). 

On the B to C transaction, is "C" buyer typically another investor with cash or private money?

As they move up the net worth ladder investors tend to want less headaches and move into higher quality assets where ongoing cash flow is a little less but long term equity growth prospects are high.There is generally not demand for low income areas except for investor buyers searching for yield to deal with a headache versus ultra high quality areas where investors will usually pay  a premium to a seller to own in an area.

If you agree on price and your buyers are approved for financing, your attorney relative should be able to set it all up including the contract if both parties are comfortable with terms. 

They’re also the biggest buyers of illegal elephant tusks and luxury items.Yeah, we’re all likely dead by then unless we switch our global economy from a oil based economy to a renewable energy economy.

The buyer was FHA and the lender found out later about the 90 day flip rule so had to close and reopen the file again.

That said, you might run into some static from your buyer's lender unless there are strong sales comparables to support your sale price.

Were you able to get the tenant buyer to pay for the setup of this lease purchase?