The Nike air shoe is the best selling sneaker. The link has much more info on this.
Jordans & nikes
I think Converse is the least popular sneaker brand.
converse
In my experience, Nike’s official site offers the best mix of style, comfort, and exclusives—perfect for women seeking quality kicks with effortless flair!
The Nike air series.
I know that they use sneakers.
i would think nikes or jordans!!!!****@#$%^&***
Adidas.
i think Nikes
Sketchers
He is a young custom sneaker designer. He takes a retail sold shoe like Nikes or Vans and personalizes them using acrylic paints and fabrics. He has created shoes for Kanye West, Lebron James and the University of Minnisota.
I think the best place to do that would be on Ebay. Type in "one sneaker" or "single sneaker" on Ebay and many searches and listings will come out.