This one is so obvious I'm absolutely certain it's been mentioned before, but it's such an important one I think it needs another boost.
Basically the entire suggestion is found in the title. I understand and fully support the fact that scavenged Rarities are bound to the player to prevent trading, but other bound items such as weapons can be freely sold to NPC merchants. There's no reason not to allow it and plenty of reasons to support it. For example, no one above Knight Elite is going to use 2-star Warm Fire Crystals, ever. Highly experienced Vanguards have more 4-star Shining Fire Crystals than they could ever use. (I'm currently approaching 20,000 of them, and many people have more.) Even Alchemy Orbs and Sparks of Life can potentially be subject to this. Why do they continue to clutter our inventories?
The pricing system already exists, just treat them as materials. Payout from FSC would go up less than 1,000 crowns, which comparatively isn't very much. Compound levels wouldn't be affected at all. The only hitch is that Sparks of Life don't have a star rating, but assigning them 0-star status shouldn't be difficult.
I won't claim to understand the underlying game code that prevents sale of Rarities, but I would guess it would be an extremely simple fix, possibly as simple as just flipping a Boolean value. Even the allegedly weak programming team at Three Rings should be able to manage that.
This is something that really has no excuse to not be in the very next update. I'm hopeful you'll agree.
They want rarities to be bound to your knight so that you can't trade them or get rid of them and are stuck with too many of them, so that gear becomes essentially free. If I have the power to craft 20 new items for free with only the cost of recipes stopping me, I would logically want to go out and craft them, right? The problem with their logic is that I need all tiers of rarity for any one item, and currently the last tier, radiant fire crystals, is incredibly time consuming to gather and prevents people from crafting up to that level... but I'd much rather see their logic in action than make the entire thing redundant because it would be so beautiful.
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I totally heat 0/1/2* gear. Or at least I used to. Now I don't have enough time to because all I go on is Dreams and Nightmare, the danger missions, and when I'm feeling lazy the jelly king.