The problem isn't really that these prices are rising extremely fast, it's just that third age items are brought into the economy slower than cash. We all know that the average rs player's bank is worth far more than it was two years ago. There are far more bank pics now with 100m cash piles than there were two years ago. Basically, everything of the old days is falling in value, but retaining the same gp value because the gp is inflating to go with it. This leaves newer items, such as GWD items, to seem like they are at outrageous prices, but truthfully, these are just about as common to see as whips and barrows items were after their releases. The sole difference is, that while your above-average player used to have 30m and bought guthans and a whip when they were that expensive, now the above-average player has 150m and buys a godsword and some bandos armor. Taking that into account, third age prices have barely risen in actual market value compared with inflation, and 20m just can't buy an item anymore that is so rare.