"Unreasonable" is subjective. IMO you're asking price is steep but I understand starting high. Guys on the forums know what these bikes are worth and you have to understand that most on this forum already have a RC51 of their own. They need a "one of a kind" or a really good deal to show interest.
"I'm surprised at the lack of interest and comments. Is my price unreasonable?"
Get in line. Mine has been for sale many places it is A1 even though it has 20,200 miles. look for my thread. Good luck at the $6,500 number, I was offered $3,500 turned it down and now I wish I would have sold. I am about 50 miles from you so it is not a geographic issue.
I paid 6k for my 2006 last week. Detroit area. It's not out of the question. Mine has 8300 miles. Sato exhaust. Crg levers. A bunch of other extras. Not a scratch on the whole bike. Still has the warning labels all over from the factory. Looks like it has 0 miles on it. Just have to wait for the right interested person. Guy I bought mine from had his for sale for almost 2 years.