The basic eBay search allows you to try out the Search Siren service without going through the registration process. Basic searches are limited to keyword searches only,
run every 4 hours, and end automatically after one week.
Registered users get full access including advanced search features such as filtering by category, minimum and maximum prices, listing types, and adjusting search frequency.
Registered users also gain access to other Search Siren features such as viewing past search results online, a watch list, and the ability to edit your existing searches.