I have a black 18" Thorowgood Saddle - it's a synthetic AP saddle. It's been kept covered and cleaned its whole life, and I really don't want to sell it but I need the money. Tree fits most fit thoroughbreds, which is what I used it on (medium wide with tall withers) but I don't have the exact measurements.
Very comfy and very clean - asking $200 or best offer. Price includes shipping to the lower 48. If you need leathers I have an extra pair but they are Havana brown and obviously wouldn't match the saddle, however I can go ahead and throw them in if you'd like, no extra cost.