Noun:

1. someone who buys something and resells it at a price far above the initial cost;

   "he got theater tickets through a scalper"
   

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1. You can buy from a scalper outside the ground.
   你不妨到球场外,试试买张黄牛票。
2. Scalper sold ticket to the concert for ten times the original price.
   卖黄牛票的把音乐会的票以原价的十倍卖出。