I offloaded all my tan codestones (1,000+ of them I had stockpiled) because the plot was just about to resume after a freaking 8 month hiatus. Once it does, codestones will come back down. Hopefully they keep the plot open for a while and let things come back down to the better prices. I miss red codestones at 3,000-5,000 and some tan codestones even under 1,000.