This custom ChipTalk link is built to show you only the real deal: Casino quality poker chips; Not the plastic chips that some sellers call "clay." http://www.eBay.com/casino-chips
Ever since getting chips that have a denom/value on the face of the chip, the game has sped up tremendously. Nobody has to ask what chip is worth what fifteen times a game (yes, they do it..) - they can look at it and read the number for themselves. I'd recommend getting the denom if possible.