I'm definitely a little "late" getting into the whole transmog thing, but now I am, I'm trying to get as many sets as I can.
I've heard you can buy some tier sets with JP's? If this is the case, do you know where from please? I've tried searching all over and though I can find references to it, I can't seem to pin-point exactly where and from whom.
This. Mogit is MUST if you are interested of transmogging even a little bit. Though it won't tell you where to buy items... that's why you have wowhead etc.