Never did it, never will. Buying gold ruins a game on several different levels. The gold buyer is spoiled by not having to grind for it. They miss out on grinding, and are less appreciative of the work it takes to get the money. I have no problems with those that wish to sell gold that was gained legitimately, but face it - the majority of it is gathered through bots, hacked accounts and other illegal programs, hence the gold seller (most of the time) is rewarded for something they didn't really earn. More gold means higher inflation on in game items, which may lead other players that were not going to buy gold into doing so, since they can't keep up with the economy! It's a slippery slope, against the TOS in many different MMOs and should be frowned upon by all.
Perfect example of a game completely ruined by Goldbuying - Silkroad Online (iSRO). Goldbots flood every single server to the point that real players can't log in anymore. Items that were pretty cheap are 10x more, and top tier weapons/gear are priced in the BILLIONS. The game only lets you move 999m at a time, so it's not designed to handle such an expensive transaction, yet that's where things are at the moment, all due to goldbuying.
Sure, everyone wants to be special, but if you don't have time to grind and get gold yourself, don't use an excuse to justify why you have to buy gold. You are still part of the problem, no matter how little or large amount of gold you purchase. Apologies for the hard line approach, but it's Tragedy of the Commons at work here - what's not to stop everyone else from doing the same thing and have it completely ruin your game too?