买椟还珠的英文：
[Literal Meaning]
buy/case/return/pearl
to show lack of judgement as one who buys the glittering casket and return the pearls to the seller

[解释]
比喻没有眼力，取舍不当。

[Explanation]
to be shortsighted and lack of good judgement

[例子]
你这是买椟还珠啊！你难道不知道应该买那幅画而不是这个破茶壶么？

[Example]
You are really shortsighted and lack of good judgement! Don't you know you should buy that scroll instead of this crappy teapot?