SECOND HAND SHOES

I'm looking for someone to help me find some used secondhand sports shoes in medium size. This is for a personal project I'm working on and I'm hoping to find just the right shoes. Ideally, I'm hoping to find a source that has a wide variety of different styles, designs, colors, and brands so I can select the perfect shoes. Ideally I'm hoping to find lightly used or new pairs but the main priority is finding shoes in a medium size that are of good quality. If you're able to help me with this project, I'd be greatly appreciative and we can discuss the specifics of the project further.