* to exchange six for half a dozen
Idiom used here and there by Some People
tɾo.ˈka(ʁ) sejs poɾ ˈmej.jɐ ˈdu.zjɐ • To make a choice or to perform an adjustment that results in zero net change.
"Viu que o Alberto comprou um carro novo?" "Comprar carro usado de novo é trocar seis por meia dúzia."
"Have you seen Alberto in his new car?" "To buy a used car is to exchange six for half a dozen."