Hey. First off, welcome to Guild Wars, and Guru.
Secondly, with pretty much all the weapons you find - you're better off selling them to the merchant than to a player. Pretty much the only weapons that are being bought and sold regularly are the weapons that are very rare, or at least somewhat desirable/rare.
As a general rule of thumb, if something is not req8 or 9 (req = weapon requirement, eg "Requires 11 Hammer Mastery"), it will not be worth selling. If it's req 9, it usually still isn't unless it's a good skin - which you will usually only find in higher-end areas. A good idea is to check
GuildWiki -- look at how many places the item in question drops, and if it mentions being a rare skin or not. If it's not mentioned as a rare skin, usually you'll take longer trying to sell it earning money than you would just playing the game otherwise, and earning money like that.