I'm working on getting this one too but from what I can see, while it's nice having an actually completely free combat bonus that also looks pretty sweet as an Engi, it's still only useful outside of instances and a minor bonus at best. The craftable constructs aren't sellable so there's no way to recoup the costs of crafting this too. Another one I'd recommend against, unless you like having the mech guardians.
Alpha Beta PTR Classic 1.1.0 1.2.0 1.3.0 1.4.0 1.5.0 1.6.0 1.6.1 1.7.0 1.8.0 1.8.4 1.9.0 1.10.0 1.11.0 1.12.0 Burning Crusade 2.0.1 2.0.3 2.0.4 2.1.0 2.1.2 2.2.0 2.3.0 2.4.0 2.4.3 Wrath of the Lich King 3.0.2 3.0.3 3.0.8 3.1.0 3.2.0 3.2.2 3.3.0 3.3.3 Cataclysm 4.0.1 4.0.3a 4.0.6 4.1.0 4.2.0 4.2.2 4.3.0 4.3.2 Mists of Pandaria 5.0.4 5.0.5 5.1.0 5.2.0 5.3.0 5.4.0 5.4.7 Warlords of Draenor 6.0.2 6.0.3 6.1.0 6.2.0 Legion 7.0.3 7.1.0 7.1.5 7.2.0 7.2.5 7.3.0 7.3.5 Battle for Azeroth 8.0.1
World of Warcraft’s newest expansion, Battle for Azeroth, is all about returning to the roots of Horde against Alliance. In order to get there, the team needed to make some bold choices, including burning down Darnassus, the home of the night elves. Add in the new Allied Race system, which forces factions of old allies like Legion’s Nightborne and Highmountain Tauren to pick sides, and a massive story-based campaign through both Kul Tiras and Zandalar, and there’s a lot of kindling there for players to get mad about online.
While it's nice flavour to reanimate golems as a good novelty once, I feel like the 1 crystal cost is utter bullshit and since it's utterly terrible in combat, there are practically no situations I can see it being 'useful'. Even if it was free, it would be minor at best. Could be vastly improved if the construct was actually effective or provided a useful effect/buff. It seems to universally give a buff to all DEs in some form, and includes getting crystals from blues occasionally as well! Naturally, the extra DE mats are quintessential for any enchanter, I wouldn't really call it 'useful' but when it becomes standard for many people to have this item, it might not be worth DEing a lot without it. Strongly recommended you get this one as a priority if you're an enchanter.

When assigning a selling price, do not aim for too low a price that would give you too little profit, but certainly do not assign too high a price. Too much greed is never a good thing, and the AH is filled with items that do not sell due to excessive inflation. A very common tactic in the AH is to sell for lower than what another player is offering, and many players make a lot of money that way. Similarly, losing sales thanks to being undercut is never fun. Aim for as low a price you can that will still make you a good profit. If you can keep producing the same item over and over, sell cheaply yet make a good amount of the item, you will reliably make a lot of money by volume. Moving inventory is the best kind of inventory.