When you say ‘A Dime a Dozen’ you mean that something is common and almost worthless.
Example of use: “Those antique dishes are pretty, but they’re a dime a dozen.”
Interesting fact about A Dime a Dozen
The origin of the expression ‘a dime a dozen’ as a figure of speech rather than an actual cost can be found in early 20th century America. A very early example comes from a 1931 edition of The Northern Miner newspaper: “Caners, the old timer said, is just an overgrown clown. As for the others – Schaof, Baer, Paulino, Risko, Campolo – they’re nothing but dime a dozen fighters.”
