I am gong to tell you how to flip in runescape.
There many ways of fliping in runescape one way is you can use a friendchat like, R_Quark, nex_n_ss, and scapeskill. Now let me tell you about this friendchats and how they work let start off with scapeskill, they flip bandos items and armadyl, and they do this by telling you the selling price of them and all you got to do is find a price to buy it at then sell it at there price this friendchat is really helpful in fliping. R_Quark friendchat is when you have over 160M so you can flip rares all they do is rares and working just about the same as the other one scapeskill friendchat. Nex_n_ss is a bit different they do spirit shields and they do all the drops from nex which are a lot of money too.
Then you can flip on your own which is not to hard you just find a 10/4 item that you buy for 10% over the middle price then sell 10% over the middle price just one of the item to see how much you make then you just switch the prices and you make what you lose the 1st time 9 times.
I hope this helped you