The asking price is $1800 which based on your wonderful information seems worth it. My hesitation is the drive to get it, but I think it pry worth it, I have only seen one other for sale in the area in the last I believe 6years
Yeah since it looks in almost new condition and it's got a $60 tach a $125 set of saddle bags and $75 wing tips on the fenders
For $1,800 is top dollar but these almost like new Whizzer's are getting harder to find.
You can try and get the price down a little by telling him your gonna have to invest in a new rear wheel
The stock rear Whizzer (Taiwan) wheel is junk the brakes suck and the hub is gonna fall apart after a few more hundred miles of hard riding. Trust me I had one

A good heavy duty rear wheel with 12 or 11 gauge spokes and a drum brake is gonna cost ya about $200
Or you can do a rear disc brake set up which will probably cost more
Make a counter offer of $1,500