Guild Wars 2

Its not on the store anymore but Crimson and Green masks are still there. Anyone know why its gone?

https://wiki.guildwars2.com/wiki/Glint's_Gaze_Mask

They are periodically removing them items then later (usually several months later) putting the items back in for a short while. It creates demand and causes sales to spike when supply is limited like this. Purchases of tems left in continuously are often put off until later, which means for many people, never.