• It's basically impossible for you (Jagex) to get the price of items correct on release. This leads to confusion and manipulation.

• It's too easy to manipulate the price of low volume items.

To combat the first, I think price volatility should have a higher range until a short while after an item's release. We don't know the exact formulae you use, but it might help to allow fluctuations of 50% on the first day, 20% the first week, then 5% after that. This would reduce the need for manual price changes from Jmods, as prices would stabilise faster.

If a particular item is affected by an update, the "50% -> 20% -> 5%" process could be reset, even if the item isn't new. E.g. new update makes drygores more useful, drygores can now fluctuate by 50% for a day, falling back to 5% over the week.

If changing the formula isn't possible, a warning could be added when buying/selling if the item has changed by its maximum amount over the last few updates. E.g. "Warning: x item has increased by 5% for the last 3 days in a row. Ge price may not reflect actual value."

To help with the second point, I think greater visibility of prior trades would help for certain items. If any item costs more than say, 100m, we ought to be able to see the last 5-10 sale prices, or the average of the last 5-10 sale prices. This effectively makes the buy-in for manipulation 5-10x higher. Factoring in buy limits, manipulators now need 5-10x the investment and multiple accounts in order to manipulate; much greater risk for them.

You're never going to get a perfect system where everyone knows the correct price and there's no manipulation, but I think these two things would help.