I thought I'd make a mega thread for retired items, how long they've been retired for, and roughly how many circulated in the game. I think how these items came about and why they're no longer in circulation could be something fun and interesting to read for many. I know I was curious thus I started researching!
I will also add in my own suggested solution based on how it disappeared. Hopefully TNT will take notice of this and start reintroducing more retired items back into the game either through events or game prizes or even back in the shops. If you have anything you'd like to add please do let me know in your replies!
PS: Not too sure if this was considered a guide thus I wrote this in Neopets Chat. If it's more suited to be a guide/information mods please move it to the respective sub-forum!
I'm going to start off with Stamps. The next few topics that I'll move on to will be decided by people in the comments
Stamps:
Virtupets
Tyrannia
Haunted Woods
Neopia Central
NeoQuest
Snowy Valley
Lost Desert
The Battledome
Coins
Other
Evil Coconuts
Altador
Charms
Other II
Faerieland
Scarabs
Moltara
Qasala
Treasures of the Deep
Krawk Island
Neovia
Charms II
Mobile Apps
Other III
Sea Shells II
Neopia Central II
Snowy Valley II
Evil Coconuts II
Scarabs II
Coins Part Deux Revenge of Coin
Other IV
Card Collector
Battledome Weapons:
Food/Gourmet Food:
PS: Some other topics for retired items: Battledome, Toys, Petpets, Books, Food, Wearables etc. Let me know what you want me to go for next after Stamps!