Well lets start this off with this ofcourse only my THEORY:
The Gold Nerf will stop a lot of people from doing old raids, this is what i keep seeing and reading and hopefully this is true. If this is true then the mats that drop from old raids will shoot up in price, Dark iron Bars, orbs, BWL elementium, Clothes and AOE loot will speed the runs up ALOT. The items will still have the vendor value for the BOP's Which will still help with gold made from raids and dungeons and the greens and blue de value should go up due to drop in people running it.