Advice for Selling my Father's Amy All-track Power Chair?

I am attempting to sell my Father's power chair. It's an Amy system all-track power chair and my Father had just gotten it shortly before he passed away, and had only used it a few times. It is HIGHLY customized with many features for mobility and comfort.  Brand new, with it's many features, it was around 22k.  I am trying to sell it for 10k.  Is that a reasonable price?  I have an add on Craigslist, but are there any other recommendations for where I can sell it? http://newyork.craigslist.org/jsy/mcy/3653709149.html