price on maps are always difficult. Honestly, people don't really get a decent wage per hour for most map making, cause they take a long time to make if you're talking detailed mapping. However, as Ravells says - sometimes you're lucky and a cartographer is willing to do it cause he is bored/likes the challenge/is feeling generous/got an A+/had a nice girl smiling to him/won the lottery/etc etc
so good luck on getting a taker at some point