A dime a dozen.
A penny for your thoughts.
A penny saved is a penny earned.
Money can't buy happiness.
Money doesn't grow on trees.
Money isn't everything.
Money is the root of all evil.
Money talks.
Money to burn.
My two cents worth.
Not worth a plug nickel.
Not worth a dime.
Penny pincher.
Pinching pennies.
Spending money like it's going out of style.
Spending money like there's no tomorrow.
Stop on a dime.
Stretching dollars.
Throwing good money away.
Too many dollars and not enough sense.