I often play as a single, and when not pressed have enjoyed scouting the woods and water holes for lost balls. I've decided that I will no longer use a water hole ball unless it's one I've just dunked, because I've seen some data on the waterlog effect. So I'm also not interested in buying used balls because I have no idea of how long they've spent soaking. I'll still use nice-looking balls found in the woods unless they have obvious squirrel tooth marks.