The value of almost all exclusive sneakers are decreasing in value or rising no longer. New releases also have less value after the release.
According to experts, it is due to the large quantities that the brands are releasing. The number of models has also increased considerably in recent years.
A recent example is the Nike Air Max 1 Dark Curry x Atmos. It was thought that the shoes would get high resell prices (prices above the retail value). However, the shoe remained the same value (retail price) in the resell world.
The Yeezy's from Adidas have also become less valuable.