Just a few more or less known gold-tips I thought I'd share. If you know of others, please append to the thread :-)

1) Prior to content patches, prices of enchanting mats and raw gems are low, right after, they skyrocket, because new gear that needs enchanting and gemming gets introduced. Tip: Buy and stock up on gems and enchanting mats a few weeks before patch hits.

2) Tip 1 goes for pvp season change as well

3) Sell potions. enchants, gems and enchanting mats during the week instead of during the weekend. Items tend to sell for a lot more during the week.

4) In game events: Find out what items are sought after and farm them - if possible in advance.

5) After an expansion hits: Until a month or two into a new expansion, BoE drops, dusts and shards sell for a lot of money. Sell it as soon as possible and do dungeon runs instead of dailes until the goldwell is dry :-)