I bought one.
I got this on amazon for 90$... is it the same one your looking at? It does only come with a 1/4" collet - but adapters can be easly fabricated for a smaller shank. I just finished making an adapter to put it in my mill and hope to cut some colorwood at a higher rpm then my ENCO spindle allows - working out dust control issues now.
"If you have great talents, industry will improve them; if you have but moderate abilities, industry will supply their deficiency." *Sir Joshua Reynolds (1723 - 1792)