They were swag from pax prime 13. I’ve been doing research lol. Those are the only official vault symbol dice I’m aware if and aregoing for crazy on Ebay, the set with the red and blue go for 40-50. To put that in perspective, a full set of actual dnd dice go between 7-25 dollars.
Short version. People would love if you guys sold a full set of replicas but if you want to get rid of a few of the d20s… PM me, ill make sure they find good homes lol