Expeditions and their prices
I handle all shipments myself. I apply fixed costs, not dependent on the weight of the article. I use La Poste standard with tracing. When the item is more valuable, I take extra care with insurance in case it gets lost. It will not change the charges you pay for shipping. For a mailing of postcards I will only add the tracing option.
An example of maximum shipping cost:For a national shipment of a painting I apply a flat fee of 12€ with insurance, and for the rest of the world 20€.