It is true that you've brought your bike to a forum dedicated to do-it-yourself types and it's obvious from the reaction of these guys that it's not the best marketplace for it. Your best bet is advertising it locally on craigslist, newspapers or bulletin boards at motorcycle shops, markets, etc. And word of mouth is the best form of advertising. You're living in or near one of the highest income areas in the U.S. (our rulers don't come cheap) and four grand is pocket change to a lot of those bozos. Get the word out!
If you don't have any luck locally, try advertising it on CycleTrader (
www.cycletrader.com) where a basic ad with a few photos is free but for $10 you can add a bunch of photos and a video. Most of the sellers are dealers so a private party prices usually look pretty good to buyers. Another, more costly, classic bike venue is Walneck's (
http://www.walnecks.com/ ) but your ad is published in a hard copy magazine sold on newsstands and to subscribers who are probably more serious.
Speaking of photos, your chances of selling the bike (anywhere) will be improved by taking high resolution pictures including close-ups, of just the motorcycle (no clutter, no scenery unless it makes the bike look better). I find the best time of day to take pictures of bikes is toward dusk when the light is softer but still bright enough to show off the gloss of the paint and chrome.
Final point regarding national advertising: most prospective buyers will be looking at $500-750 shipping expense on top of your asking price. I see bikes all the time that I would buy in a heartbeat if it wasn't for the shipping cost. Well, and that I wouldn't see the bike in the flesh until it arrived. You might have to adjust your price or negotiate something on shipping to attract a long distance buyer.
Good luck,
Bill