Prices will behave like the whip, but will NOT be similar. The first whip sold for the insane price of 50M (I saw fir3god's thread) because it was a race to 85, nobody had it yet. Here, it starts off with 2k+ people having 90 so it will probably be around 5-10M seeing as whips are still 1.6 with however many people at 85. Darts I'd guess will be around 4-5k each starting. They can't cost the same as rune, then after a couple days/weeks rune and dragon will lower. Arrows will be similar to darts.