Hi
Could mean a couple of things:
1) Your stock is dead consider farming different spots
2) Your server isn't very kind with the transmog / farming market (Even I can admit that you can't pull this off for EVERY server. some servers just avoid transmogs / BOE markets like tanks avoid fire)
3) It was just a terrible bad day on the AH (I've had many) Consider the times you are posting at, and also you can reduce your posting fees by getting rid of weapons and such.
It seems you've had some minor success in the past. Which farms we're you attending then? Maybe you can hit those harder and experiment with some new ones?