になります for being polite
When I first learned about になる it was about “to become” like
医者になります。
Become a doctor.
But today I saw this sentence:
中古品として購入したものになります。
It was purchased as a second-hand item.
So I tried searching Noun + なります without much luck until I found:
So it’s just a polite way for noun + です. It is often used by store clerks.
Instead of saying: コーヒーです。
They’ll say: コーヒーになります。
Here’s your coffee.

