I bought a bunch of quartz watches at a yard sale for next to nothing to sell at the antique mall. Problem of course was they all needed batteries. I went to Wally World and found out the battery for the first watch was only $5.89. Since I figured that the watches were only worth about $10 each that would not work very. well. I then checked ebay just to see if a deal was possible. Boy was I surprised and suspicious at what was on there. You can buy a package of 10 of any size batteries from AG1 to AG10 for $.99 and that includes shipping. I received my batteries (4 different types) and they all work just fine. Of course it took 2-3 weeks to get them from China but I could afford to wait. Save a few bucks and order ahead of time.