Usage patterns
値段が高いthe price is high/expensive
値段が安いthe price is low/cheap
The vegetables at this store are cheap.
値段をつけるto set a price (on something)
The clerk put a price on the new item.
値段が上がる/下がるthe price goes up/down
Gasoline prices have gone up recently.
値段を比べるto compare prices
I compared prices at several stores before buying.