I've been a seller on eBay for over a decade. I've tried various programs over the years, but I keep coming back to Seller Sourcebook. The site runs smoothly and if there is any kind of a technical problem, it is taken care of quickly! Their support team is US-based and their members are eBay sellers themselves so they understand what it's like to sell on eBay and what my frustrations might be! Highly recommended!