Average drop rates I'd say 1/32, even then that doesn't mean that they will drop something like an Arma hilt every 32 kills, it is completely random, it could even be after 79 kills until you get or you can be lucky as to get one in 5 kills or less.
You can get a rusty sword from pickpocketing h.a.m. members in their dungeon near lumby castle. It requires level 15 or 20 theiving.
Obtained as a drop from Commander Zilyana in the Saradomin Encampment of the God Wars Dungeon.
Monsters in the god wars dungeon drop them. They're really hard to beat though.
Killing bosses at Godwars Dungeon they drop parts of the blades, of which if you have a good smithing level, you can combine to makes a full godsword.
In the quest "the knights sword" you have to mine bluerite ore to make the bluerite sword. There is a dungeon quite close to it (near mudskipper point) that has the ore at the end of it. The dungeon starts with muggers but ends with Ice giants so watch out! (required 10 mining to mine bluerite ore)
Longsword.
Beowulf kills Grendel's mother by slaying her with a giant sword that he finds in her lair. He decapitates her, ending her reign of terror.
Runescape god swords are in fact for members but the closest weopan you can get to a god sword is the dragon 2h sword. the most expensive god sword is around 50 million gp.
You can make a Blurite Sword in RuneScape as long as you are completing the quest The Knight's Sword. After you complete the quest you cannot obtain the sword again as you cannot trade the item with other players.
or dungeon siege 2 the broken world?
vestas sword, but the best weapon is chaotic maul.
Gwd