Does this explain why every vendor seems to have exactly the same stuff? I feel like when I was a kid, there was a lot more variety, and going to different stan

Does this explain why every vendor seems to have exactly the same stuff? I feel like when I was a kid, there was a lot more variety, and going to different stands you'd see different stuff. In my town of ~8000, there are going to be four or five firework stands, all with exactly the same stuff for exactly the same prices.