10% off new price for a used reel? Once you buy something-- you experience much more than 10% depreciation the second you void the return warranty. If it isn't that old-- try returning it. If it is that old-- you will have a hard time selling it for merely 10% off "new" price. IMHO you will need to try 20-30% to get any interest. (prolly more like 40% to get any serious interest) Reels aren't like diamonds that gain value over time!
Good luck...