I know there's some luck involved as well. I try to search around 5 times a day. It's usually nothing more than a quick 2 or 3 minutes of seeing what's new. I can easily use Ebay on my phone during my work breaks or when I'm home and it takes up very little of my free time. I'd say I make a purchase this way around once every 2 weeks or so. Usually it's just something very specific that I've been looking for, like a certain instruction manual, but occasionally I come across good scores like this one.