Well the market isn't too good at this time of year, and the older dark color probably isn't anything someone is going to buy to show in. As a 1996 saddle it is 15 years old and a lot of people are leery of the care it may or may not have received. You may be better off trying to sell it on consignment through a local tack shop. That way your possible buyer will see it in person.
Saddles on ebay of this color usually don't sell that high, and then ebay and paypal eat all your sale price in fees. After that UPS or the postoffice gets their bite in near $50 to $75 depending on weight and insurance.
That being said most buyers will be looking to use it as a trail saddle and that is where they look at all the silver and think how badly it will look after its been on a few trail rides and slammed into trees, rubbed against trailers.
If you have to sell it online I would try for $550 and be willing to wiggle on the price if you really want a different saddle.
That being said I picked up a very nice little TexTan show saddle, medium oil, 10 years old, well cared for with a 15" seat for $350. The girl had it listed for a couple of weeks, I made the offer and said if she couldn't sell it to let me know. No takers came forward so I bought it.
Its a nice saddle, but I see them all the time and they sit for quite a while before they sell. In our area even the light colors are around for a long time, but our economy is still in the toilet.
Good luck with your sale!
A woman can NEVER have too many horses.....