Whenever possible, test both items in person

For a trade, meeting in person has a particular advantage: both parties can inspect what they are receiving before permanently handing over their own item.

Allow enough time to:

• identify both products;
• check serial numbers;
• verify accessories;
• test main functions;
• compare defects with what was disclosed;
• verify the cash adjustment.

Do not turn the meeting into a rush. If there is not enough time for proper checks, it is better to delay completion.