I would recommend you hold on to your low level legendary's for use in subsequent playthrough's. If you plan on creating a new character that is. It makes each play through much more fun in my opinion. It also makes it a whole lot quicker. Legendary items are hard to come by to begin with. Might as well hold onto them for the time being. There's also a few items you might like saving for new characters as well. Relics.Mods,E-tech,etc. If all else fails they have trade value.
"Now I want you to remember that no bastard ever won a war by dying for his country. He won it by making the other poor bastard die for his."-G. S. P.