The majority of the tenth level graded Mirage and Illusory Realm secret treasures were consigned in shops owned by the apex organizations in the world like the Fan Clan.
Because if they sold to the shops directly, the purchase price would be meager! Secret treasures were much desired by experts, yet to those who did not require it, they would be useless! The Dao of 'Mirage and Illusory Realm' was one of the rarer few Dao paths cultivated by cultivators. There were very few who actually reached the ninth level without relying on external materials!
Hence, it was hard to find 'interested customers' in treasures of this Dao.
When these secret treasures were sold to the shops, the shops would naturally lower the price.
Those who owned the treasures were not too willing to suffer from the loss. They rather consign it and wait for a 'buyer' to appear.
"Thistle Flower Nation."