This may be a sub-category of Contract for Deed, but owner financing may also include a wrap mortgage. This is where, for example, you want to buy my house. I finance to you $100,000 @10% for 30 years, but I have a mortgage for $80,000 @6% for 22 years.
You’ll may me $878 for 30 years. I’ll pay the bank $547 per month and pocket $331 for 22 years, and then pocket $547 for 8 years.
Of course, I have to be young enough to last that long
Selling “owner finance” means that the owner of the property holds the mortgage papers and the buyer pays that person each month. Selling “subject to” means that there a bank-held mortgage that the seller has, they are paying the bank each month and the buyer is taking that over. The seller of the property does not receive the payment every month it goes to the bank or mortgage holder.