well.. it really depends on the map maker's skill and experience. If he want's something that looks EXACTLY like that but with different geography is going to require more experience than something in a similar "style". Likewise, someone with more skill and how is in demand can charge higher prices. Assuming you are asking what YOU should charge, thats up to how long it would take you to do the work and how much you feel your time is worth. Of course, some people who have little commission work might also charge cheaper to get their portfolio build up... So really, there IS no standard pay.