Say I have a char on two servers.

Char A on Server A is in a guild but is new char with no gold.
Char B on Server B is not in a guild but has gold.
Char A & B are different factions.

Can Char B get a random guild invite on Server B and buy guild BoAs so that Char A can use them without purchasing them?

Thanks,

yeah that would work, but i'm pretty sure you need a certain reputation with your guild (honored or something), so you can't just get an invite and buy them instantly.

yes once you buy them any future character realm/faction can use them

hmmm okay thanks.

Now, when you buy an heirloom or when you log in for the first time on your character that has heirlooms equipped/in bags/ in personal bank, the Heirlooms will get put into an Account-Bound page just like Mounts. Using Default Commands, use Shift + P, and there will now be an Heirloom tab on the bottom.

Such a wonderful thing.

The heirloom tab will allow you to "Create" that heirloom. Upgrades are permanent. So if Char B upgrades an Heirloom from (Lvl 1 - 60) to (Lvl 1-90) then that Item will always be (Lvl 1-90) when you create it.

I have not tested it, but I believe the main downsides to this otherwise brilliant change is that you will have to Re-Enchant / Transmog(can u do this yet?) the Heirloom each time you "Create" it.