Looks like someone did the "I'll put in a ridiculous bid (say $1000) and no one will out bid me, not even snipers" and then along came a sniper and thought "I'll bid $800 and I'll get it for sure"
Only thing is his $800 snipe failed, so he tried $900 and then laughed at the guy paying $910 for something both of them probably didn't want to pay over $500 for.
It's all in the bid timestamps

I wonder how much effect anti-sniping features in an auction engine would have on bidding.
tiffers