Mr Morlock wrote::
If the vehicles has a proper service record and no crashes etc then something of that order is realistic. If you still have the original wheels someone might want them as well same goes for side reflectors which technically are not legal in clear.
+1
Rare car (only 100 ever built - fewer left on road today) and even rarer "unicorn" colour.
A stock SP is a collector's car so buyers will pay more for it.
A modified SP is "just another modified NB".
The "problem" with collectable cars though is that you need to wait for a buyer sometimes.
ie. Return the car to stock for a better sales price or let the buyer purchase it cheaply and return it to stock for a better sales price.
FYI: If I had the money and space, I'd make an offer for the car under $1,000 of your asking price and leave those wheels with you to sell-off separately since any rim over 16" does not belong on an NB (for driveability and performance reasons).