Try finding several of the same items and same condition ect. on e-bay or craigslist and show it to them. I do know that they try to make double what they gave someone for a piece of used gear. I would even use GC's against one another. If GC in texas has the same exact item for $200.00 less throw it in their face. Make some calls to other GC's and ask how long before they lower the price on their used gear. You have to bug them and prove to them that they are asking way to much. That is crazy almost a year and they won't budge. Talk to the manager. Thats why you see the Red Price Drop when your surfing their used gear online. I have also often seen an item priced higher in the store than online. Do research get all of your ammo together and attack.
Oh this particular kit, I was told it was the manager who turned the guy with cash in hand away and won't let them come down on the price. There's also the Hollywood Ace snare that is more than likely really a Student model, but it has the wrong rims anyway.
Also, you want a laugh, search for SOUNDKING. I'm hoping there's a typo there.