Take a good long hard look at your price. My observation has been that for whatever reason NADA pricing is overly optimistic. I sold my 2013 base RT with 25,000 miles last March for $11,500. I started at $13,000 with ads in Arizona, California, and Texas and struck out. At the 11,500 price I sold it locally within about 4 weeks. I bought my 2014 RTS with only 654 miles on it from m/c dealer, not Can Am, for $18,000 in Dec 2015.
Some folks get very defensive when I've suggested they're asking too much. One such seller is apparently still sitting on his bike and he started advertising it for sale last August. If it was priced right he wouldn't still have it. A bike should sell in couple of months if priced right.
A bit of advice from my local Goldwing dealer when I was getting ready to sell my 2005 Goldwing back in the spring of 2014. He said don't ask too much expecting to be able to come down. If the price is too high no one will even express enough interest to give you the chance to come down. If the price is attractively low a buyer will jump on it and not push hard to go further down. If a bike is on a lot for more than 6 weeks it starts to become unsaleable. If people see it on the lot that long, and they have looked at it, they figure the price is too high and the seller isn't coming down. The same applies to Craigslist ads. Run the ad for awhile, and if it doesn't sell take the ad down. Then repost it a week or two later. Makes it look like a new ad.
Post lots of photos and be honest about any blemishes. If you're up front about scratches, etc., people will overlook them. Make the description as complete as possible. If the looker is serious he'll bite quicker if he doesn't have to dig out a lot of info from you by phone or email.
Look on craigslist nationally and check the price and posting date. If you see bikes at about the same price as you're asking, and they've been there for a couple of months, that should tell you something. Do a Google search for 2011 Spyder RT site:craigslist.org.