Similar to the real world the items available in RuneScape cost money. Certain items are more expensive than other, which means you're going to have to pay for a lot of OSRS gold. We have compiled all the items , and also how much they are today to determine the areas where you can make the most money in RuneScape.
They are expensive because they're typically discontinued after certain dates. As an example, if are looking to buy one of the blue party hats that was introduced in 2001 but later discontinued, you would need to shell out 10000M for it. And that's for an item that gives you zero bonuses! It's expensive to buy Christmas Cracker, Green, White, Red and Purple party hats. However, that's RuneScape for you. The rarer it is, the more it costs.
Another product that is among the top 10 list of most expensive products is Third-Age Dye. It's priced at 2.147.483.647 RSgold - same as the previously discontinued holiday products from Christmas 2001. This dye is pricey because it's quite difficult to get by - again the price is influenced by the rarity of the item. If acquired, the dye is able to be applied to 25 items. It is impossible to remove from the dyed items.
If you finish quests, you'll get drops. One of these are Dormant Staff of Sliske (exchange value 1.273M) which you can purchase from Telos. It is a combination of Staff of Sliske, which costs even more in exchange: 2.110M coins. The staff does not just have 60.000 charges, but also get you special ability "From The Shadows".
The more products cost, the greater bonuses they offer. This is why it's beneficial in the quest to obtain more cheap RS gold to buy the items you want. Remember, that prices do change in RuneScape and you should be aware of Grand Exchange's updates.
