I picked up one off a chap in Augery Rock a few months back. I told him it was worth at least 15k, yet he was kind of thick. As he sold it to me for 5k. Still a nice addition to my q8 non inscription tainted collection. (It was 15^50 as well)
These would have been merched before the inscription system came along, still not worth that much IMO. Req8 are not as rare as people are conned into believing.