3 sentences

1. 他以高价卖掉了他的旧车。

   tā yǐ gāo​jià mài​diào le tā de jiù chē.

   He sold his old car at a high price.

   Source: Dong Chinese Dictionary

2. 这位作家的亲笔手稿在拍卖会上卖出了高价。

   zhè wèi zuò​jiā de qīn​bǐ shǒu​gǎo zài pāi​mài​huì shàng mài​chū le gāo​jià.

   The author's original manuscript sold for a high price at the auction.

   Source: Dong Chinese Dictionary

3. 这件古董在经过数十轮竞价后，最终以高价成交。

   zhè jiàn gǔ​dǒng zài jīng​guò shù​shí lún jìng​jià hòu, zuì​zhōng yǐ gāo​jià chéng​jiāo.

   After dozens of rounds of bidding, this antique was finally sold at a high price.

   Source: Dong Chinese Dictionary