+1
You could have vanity shards for different rarities. So the higher the rarity the more expensive the shard in the store for plat.

Have them tradable. And have a way of farming fragments for a shard.

A poll would be good. For the record I'm a broke player, I'm still FOR this idea. Gear that is not utilized as much will increase in price. Thus commoners like me will still be able to make money via selling stuff we loot. Sts will make money because the demand for these will be incredible.