"at a very favorable price" 或 "at a very competitive price"。
"Favorable" 来源于中世纪拉丁语"favorabips"，意思是有利的，赞成的。
"Competitive" 来源于拉丁语"competere"，意思是竞争的。
例句：
We're offering the product at a very favorable price.
You can't find a better deal than this, our prices are very competitive.
翻译:
我们以非常优惠的价格提供这个产品。
你不可能找到比这更好的交易了，我们的价格非常有竞争力。