Just thought I'd point out that Fishing, Mining, Farming, and Woodcutting are not buyable either. Farming is buyable. Anyway...back on topic. I think that making it so you can only get rare items on task is somewhat risky. Suppose you rarely ever get a spiritual mages/Abby Demons/Dark Beast task once every 20 or so tasks. Now suppose you don't get a rare drop on that task. Well, you just spent countless hours trying to get that task, and you didn't get a rare drop. I think that interest in the skill would drop and players would get discouraged more easily. Another issue: Making the rich richer is not exactly a good idea. The whole fun of getting to 83/85/90 Slayer is camping at the special monsters. Making it so the special drops increase in price means that less low level players can afford them, and more than likely high level players are the only ones who can earn them. One more problem, although a non-economical issue: Camping at monsters (and in doing so, not earning any slayer experience) such as dusties, abby demons, or spiritual mages decreases (to an extent) the number of 99 Slayer capes in existance. Once some people achieve their goal in Slayer, they choose not to go much higher in the ranks. With a system like you proposed implimented, we would (most likely) see an increase (albeit a slight one) in the number of slayer capes, just because players will have to stay on task to earn rare items. However, I think you're onto something here. There is definatly a need for a few revisions in terms of special drops, but I don't think that this particular system would work. If you refined it and filled in the probelms I pointed out, perhaps you could be onto something big :D Great work! :