You can ask $8000 but It will likely go for less. You can buy a 10 year old twin cam for $8000 now, and with the end of the season approaching, there's bikes for sale all over.
You'd do better to wait until spring, (if you can) and Ebay the other stuff separately instead of giving it away with the bike. Technically, you'll be doing just that.... Used helmets bring nothing. The other stuff are good Ebay items.
It's a nice clean bike, but the truth is, it's 18 years old and the market is down.
“When the going gets weird, the weird turn professional....” ~ Hunter S. Thompson~
R.I.P. Rubberdown. 1971-2012