Barrows items should break on death, give them repair costs.
Have the slayer ring recharge cost vote tickets/slayer points/bonds + coins
Give trident a rune cost for each attack.
For regular accounts put herbs inside of the herblore shop.
For regular accounts put bars inside of the smithing/mining shop.
For regular accounts put logs inside of the woodcutting shop.
For regular accounts put unfinished bolts/arrows inside the fletching shop.
For item sinks:
Allow items to be put into the wishing well. Value = their GE value.
Allow items to be sold back to the BM shop for 30% of their buy value. Example; item costs 100k to buy, sells back for 30k BM
Give all items a minimum alch value near to its sell price. Example; Whip would alch for 2m
I agree with everything except for the alching of items for their price, I would love to see a rare item shop as a sink like we had before. Hopefully if thats added prices are reasonable for iron men!