My players want to grab everything that isn't nailed down and then sell it or use it. The psyker even tried to strip the entire blood-soaked flak armour of a guard he killed the moment before (I gave him an IP for it, since he's fresh and doesn't have Jaded). Looting is good and all, he was just not that desperate at the time.
So my questions are: who'd buy used weapons and armour and what is a reasonable price? I went for 20-30% of the original price. And of course, did I do right to hand out an IP there? I don't necessarily view IPs as something bad, only that it reflects deviation from the normal human psyche and normal behaviour.
FYI, this was in Edge of Darkness so they're on Scintilla which of course has an impact on supply and demand.