every man has his price

Any person can be bribed in some way, as in They had trouble persuading her to join, but when they offered her a car—well, every man has his price. This cynical observation was first recorded in 1734 but may be much older, and it applies to either sex.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.