灰色市场

tōng guò huī sè shì chǎng jìn xíng yì jià mǎi mài

通过灰色市场进行议价买卖

negotiate prices and trade through the grey market

zhè ge suǒ wèi de huī sè shì chǎng duō nián lái yī zhí mèi lì bù jiǎn

这个所谓的灰色市场，多年来一直魅力不减。

It is the gray market that remained attractive for years.