A few years ago - YB males were a few hundred dollars - add in the layer of being 100% het albino to the mix, and I imagine a male YB that was also het for albino would have gone for around $500.

YB is a visual morph - this link helps explain what the markers are for a YB.

http://www.ball-pythons.net/forums/s...ad.php?t=45579

For a reference, this is what my YB female's belly looks like - see the "checkerboard" patterning along the edges of her belly?