For some reason, I thought that when you transmogged gear, the appearance-giving item would be destroyed in the process. I didn’t want to waste a good item on crappy stuff, so I didn’t touch a thing. But I just learned otherwise, and I transmogged my stuff for the first time! I can’t use exclamation marks enough! Hooray! I no longer look like a Christmas ornament with green skin and red armor! Crap matches! Hip hip hooray!
Since I had acquired the armor through questing and the two-handed axe of awesome through a party with the guild, the total cost was of the transmogging process only, about 100g.