
× Happy PriceAt least they are doing better than Yaechika over at Tokyo Station, like I described in this post; they managed to avoid using a strange exclamation point.
◯ Great Price
◯ Nice Price
Let me give you a tip. Let's say you've got an English phrase you've written, but you're not quite sure if it's natural or not.
Let's say 例えば~したとすれば、仮に~したとして、~だと仮定して、まあ言ってみれば、例を挙げるならば◆【用法】単に say とだけ言う場合もある (definition from Eijiro on the Web)Let Google help you! Go to www.google.co.jp. First, you should temporarily change your default language to English. You can do that in the top right corner of the page:

In the settings page, choose English at the top of the page:

In the search field, type your phrase, but surround it with quotation marks, like this:
- 引用符 (いんようふ) (n) quotation marks; (definition from Edict)

In the case of "happy price", almost none of the results on the first page are written by native English speakers. That's a good clue that it's not natural English.
Of course, you could ask me, too!