Final answer:
The effect of obtaining a Salvage Bin at Tier 2 is to receive a random completed item. When selling champions, their items are broken down into components, but this doesn't include Tactician's Crown. The Salvage Bin is strategic for reusing item components and adapting strategies in-game.
Step-by-step explanation:
When a player obtains a Salvage Bin at Tier 2 in a game, the effect is that they receive a random completed item. Additionally, when selling champions, their full items are broken down into their component parts. However, this does not include the Tactician's Crown. Contrary to some of the options presented, obtaining a Salvage Bin does not provide bonus gold, additional experience points, nor can champions be sold for full item components.
It's important to understand that the Salvage Bin is a strategic element which can significantly impact game play, allowing players to adapt their strategy by reusing item components from sold champions. This is hugely valuable for tailoring team composition and optimizing item use throughout the game.