询盘（inquiry）也叫询价，是指交易的一方准备购买或出售某种商品，向对方询问买卖该商品的有关交易条件。询盘函的内容可涉及：价格、规格、品质、数量、包装、装运以及索取样品等，而多数只是询问价格。所以，业务上常把询盘称作询价。询盘不是每笔交易必经的程序，如交易双方彼此都了解情况，不需要向对方探询成交条件或交易的可能性，则不必使用询盘，可直接向对方发盘。询盘可采用口头或书面形式
交易的一方为了销售或购买一批商品，向对方提出有关的交易条件，并表示愿按这些条件达成一笔交易，这种意思表示的行为称作发盘。
发盘函——虚盘的范文
Dear Sir or Madam,
Your letter of 日期asking us to offer you the product has received our immediate attention . We are pleased to be told that there is a great demand for our products in 某市场。
In compliance with your request ,we are making you the following offer subiect to our final confirmation.Our main products are as follows:
Commodity:
Size:
Packing：
Price:
Payment:
We hope the above will be acceptable to you and await with interest your early order.(We hope this offer will be of interest to you, and look forward to hearing from you soon.)
Yours faithfully,
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