Well i've noticed that on my server that copper ore goes for about 1g40s a stack of 20 but Copper bars go for 2g10s
now if you are a low lvl this means that you can just buyout the cheap copper ore and smelt them into copper bars and get an extra 90s each time u do this.
i looked in forums and i'm pretty sure this is not a repost.
there have been posts about just mining the copper ore and selling but not buying and then smelting and reselling.
hope you enjoy u lowbies
i've gotten about 80 gold just doing this past the last couple of days.