1. Let me make you a special offer.
我給你一個特別優惠價。
還能這樣說：
I can give you a discount.
I can provide you a favorable price.
諺語：
Let bygones be bygones.
過去的就讓它過去吧。

2. Can you make an offer at your earliest convenience?
您能盡快報一個價嗎？
還能這樣說：
Your early offer will be highly appreciated.
Please make us an offer as early as you can.
應用解析：
at your earliest convenience 盡早；在您最方便的時候

3. Please quote us as soon as you receive our inquiry.
請接到我們的詢價單后馬上給我們報價。
還能這樣說：
Please quote the price once you get the inquiry.
Please provide the price immediately you receive our inquiry.
應用解析：
receive指收到，著重行為本身，而不涉及收受者是否接受；
accept指領受，接收，著重除行為本身以外，還表示接受者經過考慮以后愿意接受。

4. It is difficult to quote without full details.
未說明詳盡細節難以報價。
還能這樣說：
Your enquiry is too vague to enable us to reply to you.
I could not reply for you failing to provide the details.
應用解析：
an eye for detail 明察秋毫