Use anima and teleport back to town, only to find out that you cannot even afford the ability scroll. Teleport back and continue grinding ... *Just wasted 5 anima*

As much as I like the idea, I think it should be kept to a limited range of abilities, the same way class guilds are made. I also think it should be limited to a personal currency to avoid staggering player prices. The new city factions can obviously introduce something interesting in the future.