VRS Design Simpi Leather ($17)
VRS Design has really come on to the scene over the past 12-18 months, and they make an entire lineup of great cases. New for the Galaxy S8 and S8+ is the "Simpi Leather" lineup. It's a synthetic leather that is durable and looks good without the high price tag. On the sides and inner frame, you'll find TPU for added drop protection, which also keeps the case thin and sleek.
It has a nice stylish look and comes in black or brown leather for those interested. Now on sale for under $17. Not bad for leather.