Pretty much all the battlestaffs you break even or make a few coins but they're extremely hard to buy bulks of in G.E. as they are 100 per 4 hours...but you could ask around Sythe and I'm sure people would buy them for you
A popular item to alch is yew longbows (u) I find them to be the best to alch because you can buy massive amounts of them on G.E quite fast, and you don't lose much money.. Also i would probably follow that link determinate posted if you don't want to alch what i suggested. Good Luck!