There is no longer any useful Runescape item from FryeJacob's blog

If I look back at the question, I see that both of RuneScape gold them were right. There's nothing else to buy that could provide you with an improvement in terms of gameplay. Full rune armor does not offer any armor bonuses. Trimmed armor isn't qualified to receive this benefit. Santa hats are great for owning (worth lots of gp) however a full rune helm actually gives a defense bonus while the Santa hat doesn't give any defense bonus.

There is no longer any useful Runescape item that can't be bought. Have complete rune armor or scimitar. Rune pickaxe and a hatchet. Full green dragonhide helmet. Are there any items worth buying? (3.2M GBP in your account)

I believe that the only Runescape items that can be used are items to increase one of these skills currently: Prayer 53, Magic 54, Runecraft 53, Crafting 55, Smithing 51. Other than current attack, strength, and defense, 70 ranging 52; mining 64.; firemaking 60. Woodcutting 64.

Free-to-play world: I beat Elvarg, then I practiced on ankous and got to att/str/def/hp of ca. 60 each. There wasn't anything left to do in Runescape (been to Varrock/Rimmington/Falador/all dungeons/all f2p guilds), so I made the horrible decision to explore the Wilderness: Runescape had just eliminated PvP (and in running to Fist of Guthix, there weren't any big hazards). I was prepared for Wilderness exploration by buy OSRS gold bringing complete rune armor and a rune scimitar and also an collection of lobsters.