The ONLY reason I can see for forking over those 20 simoleans is if you're the type that keeps every original part, label, tag, receipt, sales slip, and what-not that came with it (and for stuff bought afterwards for it too) in a trunk somewhere, in case somebody is more interested later on by having that whole shootin' match available on resale. It can sometimes make the package worth more to a collector especially if the scoot makes it to classic or antique age.
I've been like that with a huge total of two (out of many) bikes I've owned. My 2000 Vintage Sport was the first bike that I was ever able to afford to buy brand new... I got like every option BD had to offer at the time for it too, all packed away nicely and checked on from time to time.
It might be something to consider if you're going that route.
Have no fear ladies and gents, I also rode (and still do ride) it like a cheap... oh never mind.
Peace, Respect,
OHM