What are some good items to merchant at the Grand Exchange in RuneScape?

OK i merchant "ADAMANT PLATELEGS(T)". You buy them at lowest price, and sell them at 1gp lower than mid. (1gp lower cause it sells a lot faster!)DO NOT SPEND ALL OF YOUR MONEY!!!!!!!!!!!!!!!!!!!!!!! iF YOU SPEND ALL YOUR MONEY AND IT DOESNT WORK (WITCH IT SHOULD ALL THE TIME) YOU HAVE SOME BACKUP CASH! =) thanks! ALSO I WOULD MERCHANT EQUA LEAVES YOU GO TO THE TREE GNOME STRONGHOLD AND BUY THEM FOR TO COINS AND YOU WOULD HAVE NEEDED TO HAVE FINISHED THE GRAND TREE OR BRING TELE RUNES. OK NOW BUY ALL THE EQUA LEAVES THEY HAVE IN STOCK FOR 2 COINS. AND MOST PEOPLE ARE TO LAZY TO GO THERE SO ONCE YOU HAVE UR DESIRED AMOUNT (THEY AREN'T STACKBLE) GO TO THE GE AND SELL THEM FOR ABOUT 300GP HOPE I HELPED!