Golden Pearls (used for the vanilla 30 SP to weapon enchant) go for around 90g. Some total moron who cannot take half a second to double-check his auction misses a zero and puts up a pair at 9g each.
Of course someone buys them. Smart buyer, right? More like even bigger moron.
The seller made a careless mistake. The buyer, he willfully acted against his own profits. He sent a 162g, the difference between 2@90 and 2@9, to the seller and explained why.
The seller responded with a grateful, if poorly-typed letter.
And maybe that generic community that Larisa says we shouldn't call a community, maybe it got a little bit better.