Sell the whole dc now, in one time, so we can get a great deal If you want to make money though, you should either auction them in stacks or auction in stones, or just sell them via shop signs.
To be honest, I think burn it all so the value of stones/fragments don't go down.. Also, why did you have to post this! You now have motivated me to try to get a DC or two of fragments...lol.
The extinction of custom mobs is upon us... lol It would be a worthy challenge to gather up a DC of fragments though!