Classy Dwarves

Suprised nobody mentioned this. To be very clear the 85 has to be HONORED with the guild.

Leaving a guild drops your guild reputation by 1 standing.

It is quite possible to "buy" this achievement. You can spam trade for the race/class you need, requiring them to be Revered or higher with their current guild. Someone paid my Gnome Monk 3,500g today to simply leave my guild and join theirs, giving them the achievement.

Guild reputation is extremely easy to grind nowadays and I don't think many people would hesitate too much to leave a guild temporarily for a decent amount of gold.

If you are a smaller guild I would recommend this method if you don't feel like leveling a bunch of alts. I personally probably would have done it for as little as 500g, so it may not cost too much.

(The character that joins the guild has to relog after joining the guild in order to get credit towards the achievement)

Dwarf monk was added to this achievement in patch 5.0

Far out! This is so unbelievable - what is bliz thinkin, it's going from bad to worse!

I have a one member guild that has the sixth tab but doesn't have the achievement go figure that one! The main guild for some reason doesn't have any achievement either and only has 6 guild tabs.

Not worth the effort i'm afraid :(