r/Forging

So i play D&D and was looking around at expensive dice and eventually found a set of sliver dice. The thing is they cost $4000 for $400 dollars worth of silver. I'm curious if the labor and equipment required to make balanced dice is that expensive and any blacksmith would charge close to that or if i look around locally for a good blacksmith that could make me somthing for a lot less as a christmas gift. Becasue i see some metal dice for 50 bucks online and can't see why it would cost so much for labor unless its just that shop.