"at a lower price" 或 "at a cheaper price" 是表示以较低的价格的常用短语。这个短语来源于英语商业用语。
例句1:
The store is offering a discount on the item, so you can buy it at a lower price.
(商店正在提供该物品的折扣，所以你可以以较低的价格买到它。)
例句2:
I'll buy the car if you can sell it to me at a cheaper price.
(如果你能以更低的价格卖给我，我就买这辆车。)