Basically just go and sell something at the AH, but when you sell it put it as 1 silver below the cost.
E.G
Sell an 800g item for 799G and 99S
Surprisingly, people dont really care about the other 2 numbers, just the first number. I've done this quite a few times, guess its something in your brain that just shows you its cheaper than 800g when its really not >_> Dunno if this is omguseful but it you want that extra couple of gold, then there you go. Good for if your broke