If it is just one note then you are better off selling it directly via Gum tree or eBay or through forums. Any dealer will not offer you much as they have to make a profit and pay for their overheads. You can take it along to one of the ANDA coin shows and get the dealers to make an offer on it. I haven't had much luck doing that, a couple took my details but I only ever get advertising emails from them.
As a novice bank note collector, I am interested in your note. Can you give me your estimate of its grade and asking price please. V