Tom is always ready to make a fast buck.I made a quick buck selling used cars.
Idiom
make a quick buck
American & Australian, informal to earn money quickly and often in a way that is not honest.
Times are hard - you have to make a fast buck wherever and however you can.
make a quick buck
To make money quickly and/or without effort, often through dishonest, unscrupulous, or ethically dubious means. The people hawking T-shirts commemorating the tragedy are just looking to make a quick buck.
make a fast/quick buck
(informal, often disapproving) earn money quickly and easily: He didn’t really care about the business — he just wanted to make a fast buck.