Most places should ship a sealed battery. The battery comes packaged with its own acid pack and you put the acid in yourself and then charge it before you use it. I don't necessarily agree with Gas Man on this one, I have had good luck with Yuasa and Interstate (made by Yuasa, IIRC) batteries but they are not cheap. If you want cheap, we have a chain of stores up here called Batteries Plus that I have heard good things about. You may want to see if they are in your area as well.
Larry
Larry