I think that a server which wants to have a real and usable economy should not sell or introduce artificially gold to the server due to the inflation of the money.
People who has arrived and is starting will find very high prices in the auction house if they don' really want to spend any kind of "token" on gold, consequently it destroys any kind of activity in the market.
In my point of view it's the worst problem on private servers. That's why in wow retail they don't sell gold, it's interchanged to other player by a token.
There are other ways to earn money in a server, it destroys a lot of gaming experience.