The anniversary quest item "The Bone Rod" is sellable for 1cp. I sold accidently the wrong bag. A couple of important items poofed into the Fletcher Vendor Lenvale in PoK. I tried to get all back in buying everything which has a limited amount of it but it was not possible to vendor mine the items back. Somehow the vendors are bugged in that. The other thing is that an anniversary quest item should not be sellable for 1cp or at least it should be possible to buy it back.