It's been a while since I have posted something here, mostly cause it's darn hard to find something without doing a repost.
Anyways I seem to have dug up something which I am unable to find anywhere here.
If you go to Tabard vendor in any major city you'll see PvP tabards costing from 6 to 60 BG marks. After the latest patch you can refund your items at vendors within an hour or two.
So you can sell the tabard right back to vendor after buying and it will still count in the achievement.
1. Buy tabard for BG marks
2. Sell tabard back to vendor
3. well Duh..
This can be done for easier Epic achievement and if you can turn honor items back in aswell then for the insignia achievement!
This is a way to get achievement done easier, not get the tabards for free by the way, sorry for the misleading title