It's stunning, I imagine it would appeal to a very wide market too - way beyond glass collectors.
Be very, very careful with it!
It's got lots of corners and things with corners don't take dings and bumps kindly
The shock-waves from a ding will travel around a round piece, but come slamming to a halt at a corner.
Things with corners are harder to find - they've not survived the ravages of time as successfully as round things.