Coincidence?
Anyone notice that the robbers stole the same trashy jewellery that they used in Score. 100 million yen for that bag of cheap trinkets seemed a bit over the top.
The zombies had better dress sense too.
Does that matter? The dealer didn't want to buy the jewellery anyway, so he could make up any price he wanted. The more he promised, the better the chance that the robbers showed up, thinking about money and nothing else!
Suicide is the most sincere form of self-criticism.