Realm of Heroes
100 GP per healing dice of the potion.
CLW = 100GP, CSW = 200GP, CCW = 300GP, Heal(ALL) = 1000GP
Wand of 50 Charges of CLW would run 50×100GP + 500 GP = 5500 GP
Other wands are quantity x spell level x 100gp plus 500-1000gp for the wand.
Most things in the PHB are cost+20% (10% mark-up and 10% tax).
Each town/village/City may have its own markup/markdown depending on availability.