What sort of bars are you talking about.? Someone like you who demands source and proof of every comment made had better come up with a some proof a ridiculous statement like that....
1/20th oz bars? 1/10oz bars? 1/4 oz bars? 1/2 oz bars? 1 oz bars? 5 oz bars? 10 oz bars? 20 oz bars 50 oz bars? 1g bars? 5g bars 10g bars? 20g bars? 50g bars? 100 oz bars? 1kg bars? 1000 oz bars? minted bars? cast bars? coins?