Be ten a penny British informal
In America, people use "be a dime a dozen" instead of "be ten a penny". In Britain, "be two a penny" is a variant of "be ten a penny".
If someone or something is ten penny, it is very common, easy to get, or cheap.
I'm fed up with this kind of sentimental movie. It has become ten a penny.
Couples dressing alike are ten a penny these days.
Self-help books have been ten a penny recently on the shelves of most bookstores.
The verb "be" should be conjugated according to its tense.
Used when something unpleasant has happened that has spoilt what you intended to do
Oh, no, that’s torn it! I’ve left my wallet at home!