这个商店的商品价格很优惠用英语可以说：The prices of the goods in this store are very favorable.
"Favorable"是英语中表示优惠的常用词汇。这个词来源于中世纪的法语词"favorable"，意思为有利的、有益的。
例句：
The prices of the goods in this store are very favorable. (这个商店的商品价格非常优惠。)
We offer favorable terms for bulk purchases. (我们对大量采购提供优惠条件。)
The company's financial situation is favorable for expansion. (公司的财务状况有利于扩张。)