4 sentences

1. 长途客车票已经卖完了。

   cháng​tú kè​chē piào yǐ​jīng mài​wán le.

   Long-distance bus tickets are sold out.

   Source: Dong Chinese Dictionary

2. 商店的库存已经卖完了。

   shāng​diàn de kù​cún yǐ​jīng mài​wán le.

   The store's stock is sold out.

   Source: Dong Chinese Dictionary

3. 便利店里的蛋塔卖完了。

   biàn​lì​diàn lǐ de dàn tǎ mài​wán le.

   The egg tarts in the convenience store are sold out.

   Source: Dong Chinese Dictionary

4. 音乐会的门票早就卖完了，现场全场爆满。

   yīn​yuè​huì de mén​piào zǎo jiù mài​wán le, xiàn​chǎng quán chǎng bào​mǎn.

   The concert tickets sold out long ago, and the venue was packed.

   Source: Dong Chinese Dictionary