sell out;be sold out: (of tickets for a concert, football game, etc. 音乐会、足球赛等的门票) to be all sold 售完
The tickets sold out within hours. 几小时内票就卖光了.
This week's performances are completely sold out. 本周的演出门票全部售完.
Scalper: a person who buys tickets for concerts, sports events, etc. and then sells them to other people at a higher price (音乐会、体育比赛等的)卖高价票的人,票贩子
Overcrowded: (of a place 地方) with too many people or things in it 过于拥挤的
overcrowded cities/prisons 拥挤不堪的城市/监狱
Too many poor people are living in overcrowded conditions. 有太多的贫民生活在十分拥挤的条件下.
On sale: being offered at a reduced price 折价销售;减价出售
All video equipment is on sale today and tomorrow. 所有录像设备今明两天降价出售.