If you put it at $6,000 you will never get a call on it. Older Sportsters like that sell all day long in the $3,500-4,000 range. Look at the completed auctions in ebay and you will see what I mean. My '05 1200 with 3,000 miles on it sat half the summer at $6,500. I finally sold it for $5,400. The market for older used Harleys has been hit really hard the last few years.
It's a great bike though. Why don't you just ride it around?