Buying
When an order is taken, a down-payment is normally requested.  The final invoice, drawn up in line with the price quoted, is delivered with the products purchased in exchange for the settlement of the balance. For coins, it is possible to ask for them to be packaged in a sealed wallet. This allows their quality to be guaranteed if they are resold.

Selling
Coins sold on the gold market must be of good quality. Otherwise, the buyer can demand that the coins be replaced or refuse them (so they have to be bought back). A priori, only coins in sealed wallets automatically meet the quality condition. Hence you are very strongly advised to have your coins checked by CPR Or before placing a sell order.