"Ooh." Harvey grinned. "I AM impressed." In his mind, bartering was the way to go with THAT sort of thing. The scalpel was probably going to be making its way around Arkham for a while. The trick was making sure it stayed out of the hands of the absolute nutjobs, the ones who weren't really in their little club as such. Funny that some people WERE here for reasons other than to do with Batman, honestly, but the criminally insane were always still the criminally insane.
He grinned, handing it over. "I know you like a GOOD mystery, and well. it's a crappy mystery at best but, you know how it is." He'd gathered bits and pieces here and there to manage the layers, but at least a few things were good, especially the very last item, which featured a note from Oswald himself. They'd all had a betting pool about these two for ages, after all.