I personally disagree, price manipulation is simply another area of the game , without the continuous price fluctuations of certain items such as spirit shields, rares and barrows the prices would gradually decrease as the quantity of the items would slowly rise and eventually would loose the value of the item. Think of what merchants do, they buy many of the same item, which causes the prices to shoot up as the demand for this item is no longer being filled. After a short while of high prices and people putting their offers into the GE, the merchants will sell the item ,flooding the market and causing the price to fall (and make a lot of money in the process) . Although these fluctuations are unreliable and a bit of a gray area when buying high priced items, they also keep the price bracket within a certain area say 30m on either side at a max, for the lower end bracket of items anyway ,im sure its much higher for the top end things such as crackers. Spamming and scamming? I don't see how this could be part of it as its near impossible to scam due to the trade limit , and spamming simply blends into the usual spamming that occurs in the area anyway. Another point would be how would this be regulated? Players could simply group together and buy one item each rather than one person buying 5+, such as arcanes. How could jagex keep a check on this and distinguish between a regular buyer and a person involved in a price manipulation?