Andrew was disappointed that the girl didn't have ketamine, but he couldn't say it was surprised - it wasn't a run of the mill drug even among the dealers he knew on the streets back in the Muggle world. He shook his head when she apologised through because that was the last thing she needed to do. "Not a problem, honestly." he said emphatically.
She answered him about her sources and he could relate, had been one of the shady crowd that people introduced others to. It made him feel ashamed to be bothering her now; surely she'd had enough encounters with deadbeats to last her life, and here he was dragging her back down. He was disgusted with himself but not enough that he could walk away from the lure of incomprehension and the high that would come with taking something and he hated himself for that again too. He hoped she'd been okay, was pleased that she'd made it through to where she was now and not just because she could supply him.
"I'm sorry you were pulled into that, around those kind of people." he said, his tone sincere but the anger at those people audible as well. "I'll have to pay you back somehow. I know smack was 10 or 20 quid a gram but I didn't really need that much usually; I don't want to leave you short, I know this crap isn't cheap. I've smoked, snorted and shot up heroin, but I've never used opium before." he bit on his tongue to avoid saying that maybe it wouldn't be so bad from his point of view, knowing both that it wasn't something she'd need to be concerned about and feeling bad for being so pathetic.