Superior Salvage Kit

Summary
The Superior Salvage Kit is identical in function to the Expert Salvage Kit, the only difference being that the Superior kit has 100 uses, versus the Expert version's 25 uses.

Tyria
It is sold at all Merchants only in the following regions:
 * Crystal Desert
 * Southern Shiverpeaks
 * Ring of Fire Islands

Cantha
It can be obtained from the following collectors:
 * Imperial Quartermasters in exchange for 5 Imperial Commendations
 * Kurzick Quartermasters in exchange for 5 Equipment Requisitions
 * Luxon Quartermasters in exchange for 5 Luxon Totems.

Elona
It can be obtained from the following collectors:
 * Smugglers in the Command Post in exchange for 5 Kournan Coins
 * Wandering Scribes in the Gate of Desolation in exchange for 5 Ancient Artifacts
 * Secret Keepers in the Gate of Torment in exchange for 5 Inscribed Secrets

How To Use
Double-click the Superior Salvage Kit icon, then click the item you wish to salvage. The item is then converted into crafting material(s), a weapon upgrade or a rune, whichever is applicable. The salvaged weapon upgrade or rune will then appear in the first open slot in your inventory. The common or rare crafting materials will be stacked with like crafting materials (if you already have them in your inventory), up to 250 units at which time a new stack is created in the first open inventory slot. If no free slot is available, the item will not be salvaged and you will see a notification message.

Value for Money
There is a clear trade-off between the Superior and Expert Salvage Kits: for the cost of one Superior Salvage Kit, you could buy five Expert Salvage Kits which will provide 125 uses instead of merely 100. Alternatively, four Expert Salvage kits provide the same 100 uses for only. Thus, Superior kits cost more in exchange for the convenience of taking up only one inventory slot (or trips back to the Merchant).

When trading with the collectors, the 100 uses from a Superior Kit requires giving a them only 5 of whatever they collect, while 100 uses from four traded Expert Salvage Kits would cost 12 of whatever is collected (Expert Kits cost 3 of whatever is collected).