The WoW portion is the most impressive and important, I have 11 level 90s on Bleeding Hollow Alliance (one of each class), 2 level 90s on Sargeras Alliance (a hunter and druid), and 1 level 44 paladin with many heirlooms on Emerald Dream. My main was a Ret/Holy Paladin on Bleeding Hollow so her credentials are the most impressive, many wonderful mounts, 5350 achieve points, a few above average pets, nothing immensely special except the capability to play whatever you want to. Armories can be linked to any and all of the characters upon request. Warlords of Draenor is also pre-ordered. Afternote, most of my characters are fairly fresh, however I believe all of them (minus one or two) can do the Looking For Raid for Siege of Orgrimmar.
SC HotS, pretty straight forward, only really played the campaign all that much, placed bronze or silver in 1v1 and silver in 2v2 with a friend from a while ago, should be a clean slate this season.
Hearthstone has Naxxramas available, all classes above level 20, 2 card backs (other than basic) and several critical legendary cards, I believe sylvanas, ragnaros, cairne bloodhoof, and possibly another but I cannot recall.
Asking 450, with fresh 90s alone it would be over 700 dollars, not including a few other gimmes. Slightly negotiable but will draw rock bottom at some point.