The Hebrew word for price – מחיר – sounds like it might be related to למכור – to sell, which in the past tense is מכרתי – I sold, מכרנו – we sold, etc. But the roots are different: the root of מחיר is מ.ח.ר , while the root of למכור is מ.כ.ר . It could be that there is a historical relationship between the two roots, but that is unclear.
In any case, here’s מחיר in context:
They raise their prices every year.
We pay a heavy price.