Fast Question Hall of Fame Dust:

Hi my question is:

You create Baku now (-1600 Dust)

When the card go to Hall of Fame you get free 1600 dust + you have the card and you can convert the card to dust (400?)?

Then;  

¿-1600 + 1600 +400?

Thanks for answer my question!

Yes, you can profit 400 dust, if you didn't have it before. 

Or you can profit 1600 dust if you don't already have it and create it golden. -3200 to create it golden, +3200 refund, then disenchant for +1600.

NOTE: This does NOT work if you already have a normal copy. If you already have a normal copy, you'll just get 1600 free dust already. Crafting it golden and then disenchanting the golden gets you no extra dust at all.

Quote From sto650

Or you can profit 1600 dust if you don't already have it and create it golden. -3200 to create it golden, +3200 refund, then disenchant for +1600.

NOTE: This does NOT work if you already have a normal copy. If you already have a normal copy, you'll just get 1600 free dust already. Crafting it golden and then disenchanting the golden gets you no extra dust at all.

Reviving this thread as it's about time again...

I believe you are incorrect.  In past years when things move to HoF you get credited back the dust refund of the most expensive copy you own without having to disenchant any cards.  So if you craft a golden legendary and already own a regular copy, when it gets sent to HoF you will get 3200 dust without DE.  Then after the rotation you could DE the golden if you like, keep the regular copy, and you've profited 1600 dust from the DE.  You will NOT get dust refunded for both the regular and golden copy however, only the most expensive USABLE version you have.  "Usable" as in how many copies can be in a deck at the same time.

This means if you have two golden copies of a legendary being rotated to HoF, you get credit back for only one because one copy is all you can put in a deck when you build it.  If you have two normal cards of any other rarity and one golden copy you get credit for the golden and one regular as two copies are the most you can use in a deck.  You can of course DE any of these cards/copies after rotation to further your dust accumulation.

So in this rotation, we have heard in the leak that  Prophet Velen is going HoF.  In my case I have a regular copy already, but I will likely craft a golden copy as well.  At the expansion release and the start of the new Hearthstone year, I will see 3200 dust hit my account as the golden copy is my most valuable usable copy.  This 3200 refund cancels out the -3200 I spent to craft the golden.  However, I will likely then DE the golden for +1600 profit and craft a legendary of my choice.

Investing in golden copies of rotating cards is the BEST way to invest dust in the game right before a HoF rotation IF YOU PLAN ON DUSTING AFTER THE ROTATION.   If you are planning on keeping them for Wild, you are still basically getting free cards with no net profit or loss on dust.  Even if you have normal copies of a card going HoF and you want a golden copy for Wild, you can still have a small net gain by crafting the golden version(s) prior to the rotation and then dusting the regular copies after they move.

For a very clear explanation of how Hall of Fame refunds work, check out this page:
https://hearthstone.gamepedia.com/Hall_of_Fame#Dust_refunds