Many players trade in RuneScape in order to quickly earn large amounts of GP (game currency). Good deals for buying and selling items change often, but this article will teach you some basic rules that you can use at any point in the game to become a successful RuneScape merchant.
Steps
Method 1 of 3: Make Instant Trades for Short-Term Profits

Step 1. Choose rare items
Rare items like party hats, Halloween masks and Santa hats are highly valued due to their limited availability. These items disappear every day as more and more players lose them or simply stop playing.

Step 2. Buy new items
New items are great for short-term deals, as finding the right price on the Grand Exchange can take a long time. In addition, merchants can easily sell new items to players who want to get the most out of them.

Step 3. Speculation with objects
If merchants are working together to raise the price of an item, do not interfere unless the item has skill value or is valuable as a weapon or armor. Trade speculative items only in the case of short-term trades, because many will be eager to buy an item and increase the price of it, but when everyone starts selling it, the price will plummet.
Method 2 of 3: Make Fundamental Trades for Continuous GP Inflows

Step 1. Choose items with multiple uses
For example, a yew log can provide experience points for those who wish to craft a bow, or it can be used to light a fire. Items with more flexible use will always be in demand.

Step 2. Consider supply and demand
It is advisable to trade in items that are difficult to obtain, while rare items with a low supply should also be avoided. In addition, it is advisable to trade in items that everyone needs, rather than items for niche or top players.

Step 3. Choose an item that will allow you to invest a significant amount of funds
Because the purchase limit will only allow you to purchase a limited number of items per day. It's always better to buy something more expensive. 5% return on 1000 GP is not as much as 5% from 10000 GP. The main thing is not to spend all your savings on one item.

Step 4. Balance your patience with subject fickleness
If you want to buy an item for a long time, choose an item that gradually rises in price. If you want to take a chance, choose an item that dramatically changes in price. The main thing to remember is that high price fluctuations can lead to both big gains and big losses.
Method 3 of 3: RuneScape Buy and Sell Strategies

Step 1. Price averaging
Buy items for 99GP, some 97GP and another 95GP. If the price rises, you will increase your total profit after the items are sold.

Step 2. Buy expensive items for less than their cost
Start by purchasing items that are 5% below GE's price. Increase your offer slowly until someone decides to sell it. You will find the lowest price others will sell the item for and save your GP.

Step 3. Sell high-value items for more than their value
Set your price 5-10% higher than the GE price. Then, gradually lower it down until someone buys the item.

Step 4. Buy items in a single quantity to test the price
For example, instead of buying 100 lobsters, buy one lobster and test the price to know the direction in which the price of the item is moving.

Step 5. Apply psychological pricing
Most people set the price as even values, for example 20,000GP. If you put your price at 19.997GP, you outbid their offer. If you are understating your offer for an item you want to sell, always put its price in this weird increment.

Step 6. Set the lowest price
If you have enough GP and one of your items starts to drop in price, place a huge order for the item to stop the price drop. Then, after taking over the market, gradually sell your items to prevent the price from dropping significantly.

Step 7. Focus on a limited number of items
Don't always try to guess the most popular item. Familiarize yourself with 2-3 subjects and learn their price range. In this case, you can quickly spot a good deal.

Step 8. Set the limit
When you invest 150GP in a specific item, try to place orders at 140GP and sell at 180GP. When you successfully buy or sell an item, you can predict the path the price will take and decide whether to sell it faster or keep buying it.

Step 9. Flip
Select an item that will go up in price on the GE website. Buy it for a price between -5% and the GP price. Now wait a little. When you are loaded to the eyeballs, you can put everything in the bank for 2 or more days. Set a price between + 5% and the GP price and start selling. Wait and get your profit. Good luck!