Yup, we have thrown them around here in the forum a few times in the past year or so.
They now come in a 1.75L and soon 50ml (I think) so there will be 3 sizes, just like the KU-10. The 1.75L is like $99 at the local booze shop. I don't have the money to pick them up, but would like to some day.
I know a place that sells them.. well, I know many places that sell them, but one time I saw the 750 ml for 34.99 USD and almost went for it. Usually priced 50 bucks.
Yes that is a good price. 50-60 most everywhere you look. Should pick it up! The 1.75 is as big as a real skull if not a bit bigger. It's awesome to hold.
Oh, and for the skull lover in your life, I stumbled upon this website dedicated to the crystal skull. Found it by accident looking for light bases. They have genuine quartz slab light bases that go well with your vodka bottle or crystal skull. The link goes right to the light box page, but I encourage you to explore this site.
You can generally find them cheaper on line, yes. But what is it after shipping? To me, $13, which puts it at 52.99
Good price if you live close and can pick it up.