Disclaimer: No one can accurately predict how the prices will change Yes, sometimes the prices do go down because of the inbalance between supply and demand. This was demonstrated in past years, especially at Halloween last year. Don't be relying on it though. Are you P2P or F2P? For P2P you can always nature rune craft, or merchant basic supplies (flax, essence, ores, logs, natures or other runes). F2P will be much harder, and I would recommend power mining to 85 mining and getting a lot of rune ore.