Buying skins at Tradeit is simple;
1. Head to the store and add the skins you want to the cart
2. Advance to the checkout and complete the purchase using your store balance
*If you don't have enough balance to complete the purchase, a pop-up window will appear where you can top-up your store balance using your preferred payment method.
3. Approve it on Steam
That's it, enjoy your new skins!