Like I imagine most of you do, I lose a few balls everytime I play golf. I've been on the hunt for cost effective golf balls. I've bought used balls before, but even the economy used balls in decent condition are over $1 ball by the time you factor in delivery. These brand new Wilson brand golf balls work out to be $1.25 delivered. They may not be the best balls, but I think like most of you, my performance on the golf course has little to do with the ball.
Drummond Golf offers free delivery for any order over $25, and it seems they use express delivery for golf balls; at least they did for my order.
Using the same ball on the course is good for building consistency too. Even if you're not sub 10 handicap, or playing Pro V1X's, just using the same ball regurlaly can definitely help your game as you get used to the feel and spin characteristics.