Rather than telling your players one by one what they can buy, you can hand out shop cards that include names, prices and stats for all items they can find in a certain shop or location.

What about cursed items or items with secret properties?
As a DM, you want to keep certain things hidden from your players. That's why, where appropriate, some shop articles will simply describe what the players would perceive as they shop around. You as a DM will be able to find the full information on a product in your own shop list, within the corresponding shop/location chapter! (Find those in the Worlds at a Glance: Towns & Villages Core Book)