Depend on what kind of people the "someone" is.
Look at the function of TCredits:
1. Bid on Pricebender.
2. Sell your unwanted stuff.
3. Participating the Music contest.
For someone who have some or a lot of unwanted stuff to sell, definitely introduce them with "Sell your unwanted stuff".
For someone who like music, introduce that person about participating the Music Contest.
Else, Pricebender.
Why? It could be an entertainment.
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