Yup -- check it out. There are some doozies in there! And a great series of photos of a contemporary glass artist "building" and then making cane-cut marbles.
He also has some good info on percentages . . . for example, out of (say) 300 latticinio marbles, 80% will be white, 15% yellow, and the rest (only 5%) alternating yellow and white or other colors (red, orange, red & white, blue, etc.). Gives you a good sense of what is rare and what is not.