Promise

Tony watched as Tang Ling dug out more stuff. Although he was on the verge of crying, he simply could not.

There were the fangs of a giant numbing spider, the beak and talons of a wolf-headed bird, and the worst of the loot would be the pelt of a hopping rabbit. 

What's with all these lousy items? Is he trying to sew a pair of gloves for his lover? Why would he keep all these as a New Moon Warrior?

After a quick check, the items that Tang Ling kept matched his identity as a New Moon Warrior, but it was still too few goods, and the most valuable giant numbing spider's venom sac was missing.

However, when Tony looked at the mantis's arms and wings, he also had a basic evaluation of Tang Ling's strength, and it was a rather high one, to be honest. 

Therefore, even though the lousy items were not even worth 10 Hope credits combined, based on his personal evaluation, Tony decided to take this deal despite being on the losing end.