They'll go down. When businesses are in competition, the prices usually go up and the product/service quality increases.
The development of trade during the middle age increased thanks to the change given in the agriculture, which gave money, industry and markets a bigger importance in economy. The agriculture production was more than the consumption, which meant the creation of wider markets out of the areas. Besides, with the end of multiple wars, the population increased and new trade routes were created.
It was Madonna if I’m incorrect I’m am super sorry