I used to play that game, and if you did too between 2001-2007 it’s more than likely that I Pk’ed you (lol noob) or manipulated the price of your abyssal whip.
I think, i was farming some npcs at one point, that had a rare chance of abyss drop. Never dropped it tho. The only time, as a noob, with full mithril set & rune scimy, i went to wildy, lvl 34, some other newb tried to lure me, and 2 of his friends came out of nowhere. Their cmb lvls were, (the best part) : 30 melee, 14 mage and 9 range. Busted all 3 of em. (Laughs). One was asking for forgiveness, but, ,,no prisoners" policy back then. Never ,,pked" after that. Wasn't my thing. Was more into gambling, bots & GE trading(fliping), bit of scamming (for few days, after i got scammed), then drop parties for others etc. Eventually, while bored & gambling, blew out my 200M bank in 2 deals. All of it, 10+ years ago. P.s. Surprise but RS reached paid membership acc all time high in 2020. I thought the game was dying.
It is more likely you attempted to PK me but I just casually opened a town portal & went thru it. Sorry! During that period, I was more into simple rpgs that were created using the player worlds engine. Probably some of you have heard of such games if you came from the same era. Good OL times!