Hey gumball
First, i'm told i started a designers dice frenzy on shapeways... well i'm happy about it, mainly thanks to your thread.
The latest
Gear D10 Dice is actually symmetrical (minus 1 mm on one side)
The Gear D6 isnt - making it symmetrical makes it over $40 for metal printing.. so i leave it as "novelty" and avoid "non fair" sized in the future.
About dies cost - i personally use the most efficient method to hollow my models , as you can see on this post :
https://www.shapeways.com/forum/index.php?t=msg&S=d25c6bf 773e35783765ba888cfaa5a13&th=1169&goto=17654#msg_176 54
Any other method suggested at that thread will not come close , meaning i cut printing cost to the bare minimum WITH the recommended wall thickness - so in fact i put cost & affordability as main factor when designing a new dice.
After all 3D printing dice isnt a mass production dice.
I also hate to say it by markup is ridiculously low
I do enjoy the design process and the feedback from dice collectors community.
Enjoy
Dizingof