You can't order from that site without wholesale credentials. And you don't want to ever order online until you know exactly what the colors are you are getting. The colors are not very accurate at all, at least not on my monitor anyway. Find them at Michaels Crafts or another descent craft store and you will have more colors than you can imagine. Once you see them and have the numbers is the only time I would order online to find a better deal.
If you want to try the fluorescent ones I like, do an Ebay search for DMC light effects. The fluorescent and Tropical Glow are really nice and are the ones I want to see in person to see if they will be what I really want.
If you find an off brand they are just as good except when it comes to the metallic and specialty colors. The metallics I have tried form a generic brand and they sucked big time. Really stiff and scratchy to work with and not very good consistent color.