I can't imagine paying this amount for a pen. It is still a waterman that is unique in design of colours.
It is also having that WATERMAN'S MASTER CRAFT TOP QUALITY NIB IN VINTAGE SHAPE OF FLEXY design that is not in production anymore.
It has all that qualifications for that price tag.
But what is your idea on throwing that money to get this pen other than buying a Vintage waterman's that is on the way down below ?
A key hole No 7 waterman for an example??

https://www.ebay.co.uk/itm/373558028...AAAOSwc4BgiIkw