I talked to Thomy about this and he liked it. We're not sure how you'd like it and if it'd work, but worth a chance.
A lot of people have suggested adding the PKP system - a player would be rewarded a couple of points after killing a person in wilderness - this could be a way to revive PKing. Now, as you get points for killing people there needs to be use for these points - a PKP shop.
The PKP shop could offer PK supplies (food, potions, runes) and upgrades, WHICH WOULD BE LOST UPON DEATH, such as imbued rings, TokHaar cape, buffed whips and whatsoever.
As far as the sinking goes, you could sell your usual PK items such as DFS's, Abbyssal whips, Onyx items, Nezy's, Barrows and dragon gloves, Dragon boots and also the Godwars items (godswords, godbows, bandos and armadyl) could be a possibility. This would make the prices raise a bit and create a need for these items as people sell them for PKP which gives you temporary upgrades.
English is not my native language, don't be harsh.
What do you guys think? What could be added/changed?