Make Runescape Gold by Thieving

                                                                   Thieving Guide

Hit the stalls around ardounge market. The spice sells for about 250 gp each. The grey wolf fur sells to the varrok fur trader for 120 gp ( 180 if your wearing the ring of charos ) each. Gems are always useful. Silks can be sold back to the store owner for 60 gp each ( after a 30 minute wait unless you have the vial of stench & some haggling ). Cakes & silver are also useful.

Looting from Ogre coffins inside or outside Jiggig can be very profitable because a player can loot Ourg bones which can be sold over the Grand Exchange for 13,500 coins. The player should be aware that Ourg bones are not always the loot from coffins (even though there are other rewarding loots) and that attempting to pick the lock from Ogre coffins can cause a temporary loss of 1-4 levels of thieving or the player can get diseased, so bringing Super restore potions, Relicym's balms or Inoculation braces or Unicorn stallion, and a lockpick is advisable.

Players can steal cave goblin wires from the wire machine in the south-west side of Dorgesh-Kaan, just east of the furnace. The cave goblin wires can yield 824 coins for each one on the GE. The machine resets every 4–5 seconds. You should take food with you because you will take 50 damage each time you fail and you should expect to take at least 500 or 600 damage per trip. Tuna works well because selling one cave goblin wire on the GE will make up for the cost of the tuna for each trip, but sardines and mackerel are cheaper and therefore more efficient and require a full inventory. The use of a Beast of Burden will cut down in bank trips, but there is no Summoning Obelisk to recharge your points within the city. Gloves of silence will not increase your chances of success.
Players can crack wall safes in the Rogue's Den. You should bring food with you or have some in your bank (there is a bank in the Rogue's Den) because you will take 20-60 damage each time you fail. Possible rewards from the wall safe are uncut gems (sapphire-diamond) and 10-40 coins. Uncut gems are commonly obtainable from the safe and can be sold for good prices on the Grand Exchange. With some good luck this can easily make between 150,000 to 200,000 per hour.