I have every weapon I have ever owned. Every stick, staff, spear, spike, knife, shuriken, nunchaku, gun, sword, and many other weapons English doesn't even have words for. The very idea of letting a weapon go is so insane to me as to be unthinkable.
If you decided that you needed a particular weapon, and then later decided to get rid of it, then you didn't need it in the first place.
Yes, I understand that there is some weird subculture of freaky people who buy, sell, trade firearms, but I don't understand anything about that. That's just crazy weird.