ok, this is the link to the website:
https://www.mercatinomusicale.com/mm/a_gibson-les-paul-standard-2005_id7398724.html
The guitar is really a nice one and seems legit from all points of view, the seller looks reliable.
This is the serial (021350540) search result:
Your guitar was made at the
Nashville Plant, TN, USA
on August 1st, 2005
Production Number: 240
The black checklist (never seen before) says : this guitar is quility controlled by Gibson Europe BV, that looks like the European Gibson Headquarter located in the Netherlands.
I believe this guitar has been quality controlled in Europe, on the 14th of December 2005, that's the reason for the European Format Date.