Very nice, and I really would like at least one, and perhaps one of each, but $43 USD including shipping for one is just not in the budget, even though it/they are made of metal.
Much more economical to use a D6 and D10 pairing, or a D3 (really a D6) and D20 together.
Call me, if/when they make these in resin, or plastic.
Perhaps someone already does.
I do really like the "spin-down" number alignment for easy reading of those. That is an excellent idea.
Perhaps, if I ever hit a big lottery win…………..
Of course, I need to play to do that, so that's unlikely too.