JoeBloggs: Both UK and Australia have heavy legislation governing the telecoms industry and look at how low their prices are. We take a long time to catch onto... well pretty much everything - but it does happen eventually
"Geektastic" (See also driver testing & licencing, town planning, architecture, highway engineering & design etc etc ad infinitum!)
richms: Last I checked, prepay was the best way to have a phone that you only recieve calls on, like when selling a car on trademe, or expecting callbacks with quotes or other things where you dont want to give your usual number since you may end up with people calling at stupid hours or calling again and again after you are done and dealt with. "Oh mate, the cars broken and its gonna be $500 to fix it, I want money back" or tradies that keep pestering you for other jobs when you turn them down from their quote.
richms: You have never sold a $1000 car on trademe I take it. ;)
Looking a number up is beyond the skillset of the buyers.