I've been toying around with the idea of running a taxi service on my server - I'm currently levelling up a bunch of warlocks with RAF and was figuring on leaving them in certain places later on in order to act as a taxi service.

i.e. Use the warlocks to summon people to various places - because I've got multiple accounts I can place low level 'helpers' near the warlocks so there's no need to find someone to help out with Ritual of Summoning

What sort of a charge should I ask for and where would the best places be? I figure major faction cities, Gadgetzan, Booty Bay, Winterspring, and Shattrath - anyone have any suggestions?