Just toss it then. Not worth it.
Cheap scrolling a weapon or buying a cheap pre-scrolled weapon is fine until the end. By the 120+ point you should be looking to get a good endgame weapon or one that can manage until endgame. Endgame weapons, depending on what you think is endgame, can range from a few hundred mil to well over 3Bil. So keeping a decently scrolled gun until you get your endgame weapon is perfectly fine.