What do you mean by asking for a clear quotation for the first time?

"Open quotation" refers to the price publicly agreed by buyers and sellers in the market, as opposed to "dark quotation".

"Dark offer" refers to the price secretly agreed by the buyer and the seller.

For example-

Second-hand trading posts should be publicly traded.

First, we should make clear the quotation, explain the second-hand price when selling second-hand, and explain the psychological price when collecting second-hand.

The second is to write down the detailed information of the goods, when and where to buy them, and whether there are boxes and invoices. You'd better take photos.

Third, delete the post in time after the transaction is completed.