Amazon's categorization system is entirely broken. It's quite sad that on of the largest companies in the world has one of the worst product filtering systems I've seen. Hell, they even remove results when sorting by price low to high, but not high to low. They're Also missing thousands of sub categories and filters. Sellers even have the free reign to deliberately mislist their items, what good that does I have no idea.
EBay suffers similar problems but is more consistent witha mostly functional sorting system.
EBay suffers similar problems but is more consistent witha mostly functional sorting system.