二者都可以，例如：

1. I wouldn't work for her again ─ not at any price!我再也不替她做事了，给多少钱也不做！2.Many items are at half price.许多商品都以半价出售。

3.Oil increased in price.石油价格上涨了。4.It's amazing how much computers have come down in price over the past few years.过去这几年，电脑的价格大大降低，简直令人惊讶。