I get the internal balance thing, but really, if I use a weapon and the price gets increased reasonably, I'm still going to use it. I feel at this stage of cRPG, melee weapon price has little effect, as I tend to use whatever weapons I want, just changing the armour to save money etc etc
That said, I feel it should be similarly priced to the two handed sword, so around 8k.
It might be best to wait until the new item balance-rs are chosen, as many have promised to bring internal balance to the forc- uh I mean weapons.