What is this note worth and how to sell it?

[Ahmad H.]

Hi All,

I am in the process of selling a property where I will be holding the note for 280k (15yr term, 10%, 5yr balloon).  The property is worth 380k and I am getting 100k down from buyer. 10% return is nice on the 280k but I'd like to have a way to liquidate that note for another purchase if needed.

What would this note be worth? How to go about selling it?