Do a roaring trade (in something) British informal
To sell a lot of goods in a short period of time
Alison's done a roaring trade in second-hand clothes and helped her family to overcome the poverty.
Yesterday was a heavy rainy day, so Lee did a roaring trade in umbrellas.
The verb "do" should be conjugated according to its tense.
Used to describe someone who is good at persuading people to do or believe something
Jane is a fast talker. She has sold many luxurious villas since she worked here.