for two cents

for two cents

For nothing or very little; without needing much or any encouragement or enticement. For two cents I would gladly knock him upside the head, with the way he's been acting lately.
See also: cent, two

for two cents

For nothing; for a petty sum. For example, For two cents I'd quit the club entirely. Similarly, like two cents, means "of little or no value or importance, worthless," as in She made me feel like two cents. The use of two cents in this sense is thought to be derived from a similar British use of twopence or tuppence, which dates from about 1600. The American coin was substituted in the 1800s, along with two bits, slang for 25 cents and also meaning "a petty sum." Similarly, put in one's two cents or two cents' worth , meaning "to express one's unsolicited opinion for whatever it is worth," dates from the late 1800s.
See also: cent, two
References in classic literature ?
The stranger said, "Well, give me the seven francs again, and I will see what I can do"--and when he got them, he handed the hackman half a franc, and he immediately asked for two cents to buy a drink with.
Says I, for two cents I'd leave the blamed country and never come a-near it agin.
grouses about how much Jack's first congressional victory cost him, is: "The kid could've bee elected for two cents - he's that good.
really spent in 1960 - and not all legitimately, either - because the kid couldn't have been elected for two cents then.