Strange packages often arrive at Greg’s flat in Zaporizhia, in south-eastern Ukraine. Sometimes they contain military jackets, helmets and backpacks. But armoured plates and fragments of destroyed rockets are also common. These war trophies are sent to him by Ukrainian soldiers on the front line, so he can sell them online. Sometimes the goods are too gory to trade. “I had a helmet with parts of brain attached,” says Greg, who like other dealers did not want his full name used.