Just ask him how much a certain weight is.
For me it's
1/10 of an oz. 10 bucks
1/8th 15
1/4 25
1/2 35
1 oz 60.
But that is for midgrade.

Dank bud goes
1/16th-25
1/8th-50
1/4-90
1/2 125
1oz 180