25. Which is related to "offer subject to prior sale"?
- ①We are pleased to offer firm subject to receiving your reply by September 30, 2017.
- ②We are pleased to offer you the following items subject to our final confirmation
- ③We have a pleasure in offering you the following items subject to being unsold.
- ④We have a pleasure in offering you the following items subject to receiving your reply by September 30, 2017.
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