Not sure of the exact med/mark cost, but you can barter for your lvl 85 BG class armor with just medallions and marks at a skirmish camp. Mind you they require 4 pieces worn to get the bonus, but they're fine and cheap enough if you just want stats.
If set bonuses are what you want, do each Erebor raid once and you can barter Seals for one of your classes 3 Erebor sets (or mix'n'match for set bonuses that you want from each of the 3).
Crafted stuff is great. Can be best in slot if you get the right recipe and crit.
Lots of non-set-pieces are Bind on Equip, you should see plenty of 85 teals on the AH.
Edit: Oh... if you want specifically to play in the Moors then you will very much need one of your class's 3 Moors armor sets. Really what you need is the Audacity stat that each piece of PvMP armor grants a slice of. If what you want is gear to PvMP in, just keep playing in the Moors. That's how you earn Commendations (which are required for your class PvMP/Audacity sets).
Last edited by Ithrien; Jun 06 2013 at 06:10 PM.
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