Well, I'm too far away to be interested esp. without the lockers but if you check KBB you're basically $3K over suggested price (I considered your rig being in excellent condition). Food for thoughts...
I seriously doubt a supercharged rig is worth only $4k. if it really was documented with the updated HG, and with supercharger, you're probably not too far off at $7k. The SC is a $3k option.
Food for thought, that supercharger is pretty much unobtainable. If you remove it, guys would line up on here to buy it for $2500 to even $3k. Might sell cruiser and SC separately and you should get your $7k I'd think.
And KBB has little bearing on the value and sales price of these cruisers. Unlocked, price might be a little high, but not insane.