@Memi - because he was a battle maniac. He didn't really care about what is the best outcome - he wanted to go into fight himself, for his own enjoyment.
Also, he didn't have many friends.
@Saiangeli If we assume all the more valuable materials were left to be auctioned, it's not as strange. He could be receiving potentially thousands of gold coins later. In fact it would be weird if that guild office even had huge loads of gold lying around. He might have got most of what they have readily at hand already.
"It must be a coincidence right?" Goddamn why do they have to make literally every character so extremely stupid? This story is trash so I'll be sure to drop it subscribe to it and read every release. Thanks LHTranslation for feeding my addiction.