Mine takes 6K collets so far as I understand. The 9's take 3C collets.I just went back over the listing and this is a separate set from the lathe.
David_R8 - Is your spindle thread and hole the same size as the 9" machines? If so the collets may fit the 10K as well.
I did a quick search and a complete collet set like that would probably fetch $450It will be interesting to see what the collets and the lathe go for at the end.