Regarding the broad bolts, do it if you either rangeslay alot and dont want to pay extra for bolts or want the fletching xp. Otherwise, the slayer dart runes sell for a pretty penny. (I just went ahead and bought all the rewards for the sake of completion.) I feel lucky having bought my sara sword when they were at 5.6mil, yet i really dont use it all that much. However, for some tasks (gargoyles, waterfiends) the ss makes a good difference, and there's always plenty of ppl wanting to borrow it, so if you have the spare cash and you slay alot, i'd get one. I wouldnt worry about the possible price fluctuations too much - the use or ownership of the sword will easily cover any price drops.