In Old School RuneScape, there are many unusual items that players can collect and sell for a hefty profit. In this guide, LOLTANK will cover some of these items and the methods to obtain them.

Firstly, we have the Raw Oomlie Wraps. These are obtained from killing Umly birds in the Kebos Lowlands. They are worth around 13K OSRS GP each and are in high demand due to their use in burning for either profit or collection purposes. To obtain them, simply kill the Umly birds and collect the Raw Umly Wraps they drop. While doing this, be careful of the aggressive wolves in the area.
Another item that players can collect for profit is the Undead Chicken Meat and Undead Beef Meat. These are obtained from killing chickens and cows in the Mauritania farm patch. They have slightly different item IDs and are worth around 3.5K Gold each. To obtain them, simply kill the undead animals and collect the meat they drop. This method is low-level and requires only access to the Ectofuntus, making it accessible to most players.
In addition to these items, there are other rare and unusual items that players can collect and sell for a profit. One such item is the Bucket of Rubble, obtained during the Aid of the Myreque quest. This item is tradable person-to-person but cannot be sold on the Grand Exchange. Players can obtain up to five per account.
Other rare items include the Purple Cat and the Easter Ring. The Purple Cat is obtained by speaking to Gertrude after completing the Swept Away quest. The Easter Ring is obtained by speaking to the Easter Bunny during the 2007 Easter event.
In conclusion, collecting unusual items in Old School RuneScape can be a profitable venture. Players can collect Raw Umly Wraps and Undead Chicken/Beef Meat for a quick profit, while rarer items such as the Bucket of Rubble, Purple Cat, and Easter Ring can fetch a higher price. With some patience and perseverance, players can build a sizable cash stack by collecting these items.