Since nobody else replied...
Just eat it and move on.
How much gold is it that you'll be losing? I sold a tome of will recently for 100s, my intent was to sell it for 100g on the AH... shame on me for making the mistake.
I recall when he cap was 50, myself and 5 other kinnies went into CD and killed Helchgam, I was tasked with selling the slime on the AH for 25g, I made the mistake of pricing it at 25s, try being me and taking that information back to the other 5 kinnies! Back then 25g was a fortune!!
[center]Irin r8 Hunter // Arngar r8 Burg // [b][color=red]Akthuri r15 LM[/color][/b] // Vishus r5 Captain[/center]