I wish the city had an online inventory. Often I want to buy something specific and I am willing to go to the city for that. However, I don't know which of the

I wish the city had an online inventory. Often I want to buy something specific and I am willing to go to the city for that. However, I don't know which of the hundreds of stores carry that item and which ones are available. Sometimes I give my best guess a call, but it's a stretch. I wish there was an interface so I could search what they're offering. (For example: Who sells empty glass bottles, a braided belt, fridge magnets, facepaint? There are probably about 10 stores that have it, but which ones? I can easily walk one or two kilometers just checking them out. FYI, this is a European town.)