What is the total cost of heirloom gear in world of warcraft?

Answer 1

The related link shows a wowhead listing of heirloom gear. Note that some items, like the Family Shoulders and the Ancestral Claymore have not been seen in game yet. From this list, you can make the statements:

Heirloom Shoulders (PvE Vendors): 2,175 Justice Points

Heirloom Shoulders (PvP Vendors): 2,175 Honor Points

Heirloom Chest (PvE Vendors): 2,175 Justice Points

Heirloom Chest (PvP Vendors): 2,175 Honor Points

Weapons (1-handed): 2,725 Justice/Honor Points

Weapons (2-handed): 3,500 Justice/Honor Points (includes ranged and staves)

Trinkets: 2,725 Justice/Honor Points

Cloak: Guild rewards

Head: Guild rewards

Ring: Kal'uak Fishing Derby

Heirloom chests, shoulders, weapons and trinkets (PvE versions) can also be bought at the Argent Tournament for Champion's Seals. 60 Seals for chests/shoulders, 75 for trinkets and 1-handed weapons, 95 for 2-handed weapons, ranged weapons and staves.

Ranged set: Chest, shoulders, 2xcaster trinket, Staff = 13,300 Justice Points

Melee set: Chest, shoulders, 2x trinkets, 2-handed weapon = 13,300 Justice Points

Hunter set: Chest, shoulders, 2x trinkets, 2x 1-hander, ranged = 18,750 Justice Points