this may be common sense but w/e.
if you are trying to earn gold buying in AH/reselling in chat and are losing money buy not selling what you buy then try this.
next time, find the item you want to resell, but dont buy it straight away. instead, type in chat "WTS (link item then amount you want too sell for)" wait untill you get a reply then buy it and sell it too the person who /w you.
p.s. sorry if this is a repost, just trying too get out of leecher