NOOOOOOO!!!! Well, there's another one to add to my long list of discontinued loves...
@Exciter76 it still can be found on the gray market.
That's how I got my bottle. To be fair, my 4.2 oz bottle will last me forever.
My bottle is at least 1/2 full. Because of that I haven't bought a backup bottle, yet.
Omnia - I think I would have used it for life and never tried anything else! It was like spicy and sweet chai tea. I don't understand why they discontinued the original and keep releasing variations of it.
Love of my life! I still own two bottles (none of them is full, though), but sometimes I think it would be better for my mental health to just use them up, move on and forget about it.
Some that come to mind are
Métalys Metallica
Ispahan (1977) Eau de Toilette
For nostalgic reasons:
My nose probably wouldn't appreciate them like it did back in the day but it would be a glorious trip down memory lane though.
I would also like to add 
Dahlia Noir Eau de Parfum . Plain to some, not so much stellar to me but oh so good when I am overstimulated or just a bit more low key. Lovely fragrance.
And also Narciso Rodriguez Narciso eau de parfum (creamy white bottle).
Easily Dior Homme Parfum 2014 or 2020, London by Tom Ford, and maybe Balenciaga's Florabotanica. more as time goes by....
Fleur du Male de Jean Paul Gaultier
Dolce & Gabbana para hombres (1994)
Mugler Pure Tonka
Dior Homme Intense (2007)
My grandma gifted me a bottle of 
Chloé (1975) Eau de Toilette for Christmas when I was about 13.
As expected, I was not a fan. (I love my grandma and god bless her, but the woman has a tendency to buy other people’s gifts for herself). At that age, I thought the juice smelled like “cigarettes and disappointment.”
And as it turns out…14 years later, “cigarettes and disappointment” is exactly the kind of scent profile I’m into now. But by then, I had already gotten rid of my bottle… #emotional
I miss 
Manifesto so much. Does anyone have any recommendations for something very similar?
Cherry in the Air - they need to bring it back!
I'm really enjoying 
Chai Town layered with a ginger cookie lotion.
I wish the shop was still in existence so that I can buy the other scents that they offered.
I like "The Unbaptism" by Southern Gothic...
The very first fragrance that I ever recall enjoying enough to buy with my own money was 
Light Blue Italian Zest
I still have my bottle from many many years ago with the tiniest bit of juice left and, objectively, it smells like lemon pledge surface cleaner. So would I buy it today if it hadn't been discontinued? Absolutely not. But it was the fragrance that sparked a teen girls interest in the perfume world and for that I owe it a great debt.
The very first fragrance that I ever recall enjoying enough to buy with my own money was Light Blue Italian Zest
I still have my bottle from many many years ago with the tiniest bit of juice left and, objectively, it smells like lemon pledge surface cleaner. So would I buy it today if it hadn't been discontinued? Absolutely not. But it was the fragrance that sparked a teen girls interest in the perfume world and for that I owe it a great debt.
Wow…Italian Zest was my favorite in the line and one of my most complimented. Lemon Pledge? lol
I'm far from being a Swiftie...but I really enjoy 
Wonderstruck Eau de Parfum
Also,
Armani Code pour Femme Eau de Parfum
Lastly,
None of them are the most unique, but I have happy memories attached to them all.
I have been slowly re-adding these discontinued gems to my collection.
Did anyone ever wear 
Eau des Missions ? I was just thinking of this recently and how I used to have a large bottle of it and it just disappeared one day (maybe when I moved, or it was put with donations by accident). I really miss it. It's supposed to be similar to Guerlain's Spiritueuse Double Vanille, but I haven't tried that. It was so good and inexpensive. The bottle was huge, too. (500 mL!)
Encens Mythique
Néonatura Cocoon
Parure 
Fate Woman 
Joy 
1000 
Angel (2011) 
Angel Eau Sucrée 2015
Moments 
Samba
Miss Sporty Musk
Magnolia 
Pivoine
L'Homme Ultime
Signor Vivara 
Eau de Vivara
Signoricci 1 
Mouchoir de Monsieur
L'Anarchiste 
Monsieur Rochas 
H pour Hommes - Lavande 90°
Ho Hang 
Monsieur Worth 
Messire 
Monsieur Note Havane
Tamango (1977) 
Léonard pour Homme 
Eau Fraiche de Leonard
Patou pour Homme (1980) 
Voyageur 
English Lavender
L'Eau d'Issey pour Homme Sport
Missoni Wave
Vera Wang for Men 
Mugler Cologne
Theorema 
Eaudemoiselle
Play Intense