Starting today there will be a sale on keys in the Zen Store, along with a Trade Bar Store sale.
For VIP members of rank 3 and above you can get 33% off on Star Rover Key Bundles from Feb 25th to March 5th.
All Enchanted Keys are also off 15% for all players until March 2nd.
The Trade Bar Store is 20%, also until March 2nd.
I hope you enjoy the sale and get some mounts with your keys!