Originally Posted by rickpaulos

eBay leaves it to the sellers to classify their items. eBay provides the categories, the sellers choose from them when listing. Categories are mostly pointless if you are keyword searching for a particular item. Categories work best if you are "just browsing" or for eBay trying to push items in your face. Anyhow, trying to count items by categories is pretty inaccurate as many sellers get it wrong for various reasons. If you look at "bicycles" (43,000 today), sorted by price (low to high), the majority of low priced items are not "bicycles" and some aren't even bicycle related.