You know it's a pretty common thing in Scandinavia? It's not really a buffet where you can get refills but you get to fill a bag with how much candy you want and then pay for it per kilogram.
FAO Schwarts in N.Y?I have (I probably spelled the name wrong please correct me if I did)and they have a whole section just for candy and it is AWESOME.They have little Chinese food boxes but the front Is clear so you can see what candy you're getting and there are these big tables with candy on them.....it's heaven.
http://t3.gstatic.com/images?q=tbn:ANd9GcQb4Q39qxsf8O6orFnh2rEqsWrt1xpWA3v0_ohwd1FV3QUv6vxHHg:upload.wikimedia.org/wikipedia/en/thumb/9/93/Ms._Brown_(M%2526M%27s).png/120px-Ms._Brown_(M%2526M%27s).png
P.S.: Which is the healthiest option on that buffet table?