I run a spreadsheet containing approximate values for most items in the game, links to vendors under them (you can be added too!), and short trading guides. This is meant to serve as an alternative to the notoriously outdated and unregulated Fandom wiki.
The Frequently Asked Questions tab on the sheet provides most other relevant information, but questions and feedback can be left in this thread, the Discord forum post, or commented directly onto the sheet.
From my personal experience with selling things in the Grand Exchange the values for at least the commodities looks to be accurate since it was last reviewed. Really impressive price list.
