I am speaking from experience and from messages taken from other users.
I feel that the item "Ring of Stone" was not the best item to be merchanting at this time. I feel we should merchant a more popular item that people need/want more of. The "Ring of Stone" is a luxury item, not a reagent. Maybe we can drop the dump price to 299K/399K/499K so we can move on and make more lumps of cash in a minimal amount of time.
This was a suggestion built upon mine and 30+ other user's feelings.