FYI, I have a snap press from OSDiaperShop. Snaps from the Snapstore WILL NOT work with my press. The Snapstore sells KAM snaps. However, if you order from Serena in China, her press package is a great startup cost and her dies are the same as from the Snapstore, so you could reorder KAM snaps from the Snapstore. Or reorder from Serena, she sells sets of 100 KAM snaps for $5, and I think shipping is included. From the Snapstore they are $8 for 100 sets.
At any rate, if I had a choice to do it over again I would order from Serena. OSDS is spendy, they charge a lot for shipping and you can't get the snaps anywhere else. On top of that, I had a problem with my snap press a few months back, e-mailed OSDS for help and they never replied. Luckily I had just stumbled upon the Diaper Sewing Divas website and those awesome ladies had the anwers I needed!
Oh, and ETA: If you need dies, Serena sells them for $15 a set. The Snapstore will sell the same one for $28.