Man in the Funny Hat
Hero
For most all practical purposes, I'm not concerned AT ALL. It is laughable to me that it really is even a concern to anyone. Statistics geeks as much as anyone should appreciate that FOR D&D and like-games, it's just not a meaningful factor in the grand scheme. I have yet to see ANYONE, IRL or online or anywhere, actually demonstrate the ability to use biased dice to reliably cheat without using actual LOADED dice. Any result that normally biased dice lean towards is UTTERLY lost in the noise of the system wherein those numbers are being generated - for ANY rpg game system. For D&D or D&D-style games it not only shouldn't matter if anybody's dice are normally/marginally biased (even the DM's), it is completely undetectable except by autistic players who might remember every roll of every die and be able to analyze them all.What I'm more interested in is how concerned are you about dice balance?
The only real problem I have with dice is not bias. It is simply being able to READ them, either as a DM able to read players dice rolls, or more often players themselves not being able to read their own dice because the numbers are indistinguishable colors or use indecipherable fonts.
Beyond that, let players spend as much or as little as they like. I appreciate unbiased dice for RPG gaming, but don't have the money to freely spend on that which provides no detectable or reliable benefit for anyone.