Rare Fuller's vintage ale 2003

Hi all, I’ve recently found a bottle of Fuller’s vintage ale from 2003 sealed in box that belong to my farther.

I decided to look online to see if it was worth anything and after not being able to find it for sale anywhere, and seeing listing for other years going for £100+ I started looking on some forums.

I stumbled across this forum (https://www.ratebeer.com/forums/looking-for-a-fullers-vintage-1998-2003_205537.html) saying that people are looking for it and that it is rare. I’m interested if anyone on here is looking for one or can give me any further information on it.