Most Mastery-rewarding items can be directly bought, built, or researched. However the following items had a limited distribution period or were removed from circulation entirely.
| Item | Count | Mastery |
|---|---|---|
| Market Retired | 2 | 6,000 |
| Founders Pack | 3 | 12,000 |
| Nightwave Series 1 | 1 | 3,000 |
| Event Reward | 8 | 24,000 |
| Void Trader | 23 | 72,000 |
| Prime Vault | 61 | 255,000 |
| Total: | 98 | 372,000 |
Market Retired
Acquisition: Events or Special Alerts
These items were once available from the Market but have since been removed. They cannot be traded, but may rarely appear as rewards for Events or Tactical Alerts.
| Item | Count | Mastery |
|---|---|---|
 Snipetron |
Primary | 3,000 |
 Machete |
Melee | 3,000 |
| Total: | 2 | 6,000 |
Founders Pack
Acquisition: None
These items were part of the Founders Program, rewarding those who donated during the crucial early stages of the game. They cannot be traded and will never be offered again.
| Item | Count | Mastery |
|---|---|---|
 Excalibur Prime |
Warframe | 6,000 |
 Lato Prime |
Secondary | 3,000 |
 Skana Prime |
Melee | 3,000 |
| Total: | 3 | 12,000 |
Nightwave Series 1
Acquisition: Wolf Beacon
This item is only obtainable by killing the Wolf of Saturn Six. He spawned during the Nightwave/Series 1 and can now only spawn with a Wolf Beacon.
| Item | Count | Mastery |
|---|---|---|
 Wolf Sledge |
Melee | 3,000 |
| Total: | 1 | 3,000 |
Event Reward
Acquisition: Events, Special Alerts, or Celebrations
These items can appear as rewards for Events, Tactical Alerts, or celebratory periods. They cannot be traded, except for parts and blueprints of the 
Gorgon Wraith, the blueprint of the 
Ignis Wraith, and the components of the 
Imperator Vandal.
| Item | Count | Mastery |
|---|---|---|
| Gorgon Wraith |
Primary | 3,000 |
| Imperator Vandal |
Arch-Gun | 3,000 |
 Dex Furis |
Secondary | 3,000 |
 Dex Dakra |
Melee | 3,000 |
 Dex Sybaris |
Primary | 3,000 |
| Plague Keewar | Zaw Strike | 3,000 |
| Plague Kripath | Zaw Strike | 3,000 |
 Athodai |
Secondary | 3,000 |
| Total: | 8 | 24,000 |
Void Trader
Acquisition: Purchase or Trade
These items can occasionally appear with Baro Ki'Teer's merchandise. Unranked weapons can be traded.
| Item | Count | Mastery |
|---|---|---|
 Mara Detron |
Secondary | 3,000 |
 Prisma Gorgon |
Primary | 3,000 |
 Prisma Veritux |
Arch-Melee | 3,000 |
 Prisma Skana |
Melee | 3,000 |
 Prisma Grakata |
Primary | 3,000 |
 Prisma Dual Cleavers |
Melee | 3,000 |
 Prova Vandal |
Melee | 3,000 |
 Machete Wraith |
Melee | 3,000 |
 Prisma Tetra |
Primary | 3,000 |
| Prisma Shade | Companion | 6,000 |
 Prisma Burst Laser* |
Sentinel Weapon | 3,000 |
 Quanta Vandal |
Primary | 3,000 |
 Aklex Prime‡ |
Secondary | 3,000 |
 Vulkar Wraith |
Primary | 3,000 |
 Prisma Obex |
Melee | 3,000 |
 Prisma Angstrum |
Secondary | 3,000 |
 Viper Wraith |
Secondary | 3,000 |
 Supra Vandal |
Primary | 3,000 |
 Prisma Twin Gremlins |
Secondary | 3,000 |
 Akvasto Prime‡ |
Secondary | 3,000 |
| Ignis Wraith |
Primary | 3,000 |
 Prisma Grinlok |
Primary | 3,000 |
 Zylok |
Secondary | 3,000 |
| Total: | 23 | 72,000 |
- * Prisma Burst Laser is included with Prisma Shade and cannot be obtained separately.
- ‡ Aklex Prime and Akvasto Prime cannot be purchased directly. Aklex Prime parts can be obtained through Axi A2 Relics, and Akvasto Prime parts can be obtained through Axi A5 Relics, both of which are exclusively sold by Baro Ki'Teer.
Prime Vault
Acquisition: Legacy Relics, Trade, or Prime Vault Access
Relics containing their parts have been placed in the Prime Vault, no longer appearing in drop tables. However their parts and relics can be traded or used normally. Occasionally the Prime Vault is unsealed for a limited time, accompanied by a special Prime Vault Access.
| Item | Count | Mastery |
|---|---|---|
 Frost Prime |
Warframe | 6,000 |
 Latron Prime |
Primary | 3,000 |
 Reaper Prime |
Melee | 3,000 |
 Mag Prime |
Warframe | 6,000 |
 Boar Prime |
Primary | 3,000 |
 Dakra Prime |
Melee | 3,000 |
 Ember Prime |
Warframe | 6,000 |
 Sicarus Prime |
Secondary | 3,000 |
 Glaive Prime |
Melee | 3,000 |
 Rhino Prime |
Warframe | 6,000 |
 Boltor Prime |
Primary | 3,000 |
 Ankyros Prime |
Melee | 3,000 |
 Loki Prime |
Warframe | 6,000 |
 Bo Prime |
Melee | 3,000 |
| Wyrm Prime | Companion | 6,000 |
 Prime Laser Rifle* |
Sentinel Weapon | 3,000 |
 Nyx Prime |
Warframe | 6,000 |
 Hikou Prime |
Secondary | 3,000 |
 Scindo Prime |
Melee | 3,000 |
 Nova Prime |
Warframe | 6,000 |
 Soma Prime |
Primary | 3,000 |
 Vasto Prime |
Secondary | 3,000 |
 Volt Prime |
Warframe | 6,000 |
| Odonata Prime | Archwing | 6,000 |
 Ash Prime |
Warframe | 6,000 |
 Vectis Prime |
Primary | 3,000 |
| Carrier Prime | Companion | 6,000 |
 Sweeper Prime† |
Sentinel Weapon | 3,000 |
 Trinity Prime |
Warframe | 6,000 |
 Dual Kamas Prime |
Melee | 3,000 |
 Saryn Prime |
Warframe | 6,000 |
 Nikana Prime |
Melee | 3,000 |
 Spira Prime |
Secondary | 3,000 |
 Vauban Prime |
Warframe | 6,000 |
 Akstiletto Prime |
Secondary | 3,000 |
 Fragor Prime |
Melee | 3,000 |
 Nekros Prime |
Warframe | 6,000 |
 Tigris Prime |
Primary | 3,000 |
 Galatine Prime |
Melee | 3,000 |
 Valkyr Prime |
Warframe | 6,000 |
 Cernos Prime |
Primary | 3,000 |
 Venka Prime |
Melee | 3,000 |
 Banshee Prime |
Warframe | 6,000 |
 Euphona Prime |
Secondary | 3,000 |
| Helios Prime | Companion | 6,000 |
 Deconstructor Prime‡ |
Sentinel Weapon | 3,000 |
 Oberon Prime |
Warframe | 6,000 |
 Sybaris Prime |
Primary | 3,000 |
 Silva & Aegis Prime |
Melee | 3,000 |
 Hydroid Prime |
Warframe | 6,000 |
 Ballistica Prime |
Secondary | 3,000 |
 Nami Skyla Prime |
Melee | 3,000 |
 Mirage Prime |
Warframe | 6,000 |
 Akbolto Prime |
Secondary | 3,000 |
 Kogake Prime |
Melee | 3,000 |
 Zephyr Prime |
Warframe | 6,000 |
 Tiberon Prime |
Primary | 3,000 |
 Kronen Prime |
Melee | 3,000 |
 Limbo Prime |
Warframe | 6,000 |
 Pyrana Prime |
Secondary | 3,000 |
 Destreza Prime |
Melee | 3,000 |
| Total: | 61 | 255,000 |
- * Prime Laser Rifle is included with Wyrm Prime and cannot be obtained separately.
- † Sweeper Prime is included with Carrier Prime and cannot be obtained separately.
- ‡ Deconstructor Prime is included with Helios Prime and cannot be obtained separately.