Ro Zeny and katana you will get when you once change to swordman. Two hand swords, being the most important weapons for AGI knights as two hand quicken is for two hand swords only.
Katana
A sword which does 60 ATK but you will need to use this when you change to swordman, the brother sword of tsrugi. Used by sumurals of japan.
Slayer
A sword that does 90 ATK. Get it if you want but I don recomend it.
Bastard sword
A sword that does 115 damage get it once you have the money until you change job to knight.
Broad sword
A two hand sword that gives defence but i don recomand you to use this, too expensive some more it does only 140 ATK. A two hand sword is better.
Two hand sword
The most strongest two hand sword you can get from normal shops some, more if you can get a two sloted one, good for you put andre cards to bost its ATK power if you want.
Claymore
A very strong sword but hard to get, it does 180 atk but no slots, if you know where to get it buy it, it do good use too.
Rare two hand swords are hard to get but a muramasa is easy here are a list of them I know.
Dragon Slayer
Does 150 atk power but good for slaying dragons only. Think how many dragon type monsters are there in RO but do not know where to get it.
Executioner
The brother sword of mysteltainn as their attribute is darkness but you have to do a quest to get it, does 155 ATK.
Schweizersabel
A sword that can gives you the power to cast lighting blot so useless because you have no INT. Do not know where to get it.