A system and methods for prioritizing and processing updated inventory information for event listings are described. In one embodiment, a network-based system may receive updated ticket information from a seller for multiple event listings, categorize the updated ticket information from the seller by event, prioritize event categories comprising updated ticket information in accordance with a prioritization policy, and process a prioritized event category comprising updated ticket information for a particular event listing out-of-order with respect to one or more other event categories comprising previously-received updated ticket information for other event listings. Other embodiments are described and claimed.