Alright Get Into a HUGE ass guild and get to know everyone.
When you see someone in trade ssaying wts [ Insert Name Here ] without a price tagged along, offer some numbers that you know is cheaper then the item itself, like 100g off ( if its really expensive) but make sure you would be able to sell it back for more later. If the person knows that its cheap he'll be like nah, but then have your guildies pst him offering prices even lower then yours, and keep doing it. eventually you'll break him seeing as you'll have the highest bid. it doesn't always work but its something that might save your some serious gold, and end up making you some in the end.
just a tip for people who dont know
so guys, Flame On
im to cool to care