Do I Have A Rare Stamp? World's Most Expensive?

Hello,

I've recently obtained a mint block of four Monaco stamps depicting Princess Grace.

One quick look in a catalogue and I realise they might not be worth much. However…

I stumbled across a website showcasing the world's most expensive stamps and in it is they describe something very similar to what I have.

Here's the link: https://findyourstampsvalue.com/rar...ps-of-monaco

The page describes a mint block of four of these stamps in 'fresh black colour' which sold for a whopping $1400. Yikes!! The stamp shown on the page looks more dark grey than black though. Stamp catalogues also describe the stamp as being 'dark blue / grey'. And my stamps are definitely a dark bluish grey colour. See below for a scan of what I have.

So my question is, do I have stamps worth $1 or $1400?

When the site calls the stamps 'fresh black' is that philatelic speak for dark grey? or am I being too optimistic :)

Does anybody here know anything about these stamps or the auction in which they sold for that price? Any help would be most appreciated. :)

Huge thanks in advance.

No sorry. These sites that describe the world's most valuable stamps are usually poorly researched and inaccurate.

The Cherrystone lot that sold for $1400 in June 2010 had this description:

1957 Princess Grace, color trials collection of 106 different (!) sheet corner margin imperf. blocks of four (424 stamps), serial numbers 1-106 representing progressive stages of trial color, value tablets black, n.h., printer's pencil notations on reverse, few marginal faults, still v.f. and impressive group.

The drawback is that the illustrated rarity is imperforated, while yours are perforated. Yvert CV for unmounted mint is €0.20.

Welcome.
You have stepped into a common hole in our hobby. Rare stamps are just that...rare. Finding a rare stamps is like finding gold or a diamond, the odds are astronomical that you would go into your back yard and find a diamond among all the rocks. Same is true for stamps.

Always work from the assumption that you have the most common stamps; but 'the hunt' can be enjoyable so doing discovery like you have done is a good start!
Don

Thank you all for your speedy and knowledgeable replies. :)
The reality is kinda what I suspected.

Thanks Don for your 'assume you have the most common stamps' advice. :)
I've certainly found that to be true many times having recently delved into the philatelic rabbit hole.