A hide becomes leather. The gap can pay. The wrong fee can wipe it out. Crafters need leather. You can buy hides, tan them, and sell the material they want. Start with the route your account can use. Then check what is left after fees, runes and tax.
OSRS-GE is a free Old School RuneScape Grand Exchange tracker. Prices come from the OSRS Wiki Real-time Prices API and refresh every minute. Every margin shown subtracts the 2% GE tax, capped at 5m gp per item, and respects each item's 4-hour buy limit, so you see the profit you can actually make. Use the calculators to compare flipping, overnight offers, High Alchemy, herb cleaning, decanting, Plank Make, tanning and other money making methods, and read the guides to learn margin checking, how to avoid fake margins and when to trade.