Seller Financing is Confusing Me..

[Todd C.]

I'm working on a situation where I physically cannot wholesale this deal at a profit, so I'm actively searching for other avenues...

APV: $125,000

Outstanding Mortgage: $100,000 (was a $200,000 loan)

Is there a way I can structure a deal with seller financing so the buyer I find would assume the remaining mortgage and pay a down payment of $10,000 ($5K to seller, $5K to me)? 

Everything I've read suggests that the buyer must pay off the mortgage upfront and then can implement a seller financing deal for the remainder of the purchase (if there is any). 

Apologies in advance if this has been covered - I haven't been able to find a direct answer.