I need advice on buying a chuck!

[gilraen690]

When I started doing lathework a year or so ago, my father handed me a small cardboard box and said, "and if you ever want to use this, here's a chuck!"
The box said Multistar Duplex Chuck, and I looked at it in wonder. Then tried to read the confusing instructions, put it back in the box, and continued doing my woodwork as I'd always done it.
Now, a year later, I tried using this chuck. And, as I soon realised, the chuck I had wasn't the chuck in the instruction manual. So here I am. I'm stuck. And I'm pretty much toying with the idea of buying a whole new one.
First off, I need to know WHERE to buy one. I've tried eBay, but can't seem to find anything good.
Second, does anyone have any advice? Any brands I should look out for? Anything that's ridiculously expensive compared to quality? Anything with *cough* bad instruction manuals?
I appreciate all help!!
-Ellen (18)