Category numbers:
You can optionally enter additional
eBay sub/category numbers (numbers there are hidden at the end of eBay category URLs) to include for your search, comma-separated. (Max=10 categories, including category selected up top.) Or, an easier way to get these category numbers is to use our "Drill Down Category" selector after displaying a top-level category above.
…
Show All Subcats: Returned results are further detailed by subcategory. All subcategories are included (beware: potentially overwhelming) for 1 primary selected category. Best used for narrow, deep subcategory branches.
…
Max Keywords: We'll try to retrieve up to this number of related search terms from eBay's database (but many times eBay's data feeds are limited to just a handful of terms).