DzarsosThe Time is definitely my most extravagant LOOKING fragrance.
Price- and quality-wise, it's probably "Oud for Greatness | Initio" , Elysium Parfum Cologne Eau de Parfum , or one of my MFKs.
But I wear those whenever I feel like - if we're talking about the ones we only wear once in a while, and spent too much on, well, that's probably my post-discontinuation bottle of Armani Mania pour Homme Eau de Toilette . It was the first scent my nose ever picked apart and said "there's more than just one smell here", and it made a lasting impression - so much so that I bought it for a stupid amount of money a couple of years ago, just to have that experience again.
Which MFK(s) do you have? I only have Masculin Pluriel - which I love wearing.
I feel for you paying through the nose for something they no longer make, it happens all too often. One of the biggest offenders for this is Tom Ford…makes something great (presumably sales aren’t good) and it gets binned. That said, it can present a strange case where you can turn a profit from something (if you’re shrewd).