I have 2 My first one was when I was about Level 20. I had just turned f2p and I had just killed enough men to save up for a steel longsword. I went to the duel arena to test it out when I met a level 97. He challenged me, putting up addy platelegs. I accepted and we went to duel. He was nice and let me kill him for the legs. Then I went Louie Leg's Shop, sold it for 2k and went up to Varrock to buy a Mithril Long and fire staff. :D My second is when I was around Level 50. I only had 12k, mithril full helmet and a couple ores. I wanted to buy this guy's rune longsword. Amazingly enough he accepted my offer and was able to sell it for 30k. I felt so rich! 8-)