"Excellent." Aziraphale smiles brightly, looking forward to the research ahead of them.

As for Lucifer paying, the angel looks a tad uncertain. Does it really count as a gift coming from him if he's not paying for it himself? It's not as though he has a shortage of money, either, although the shopkeeper might prefer actual gold. "That would make for a smoother transaction," he agrees reluctantly. "But only if I can purchase the necessary accessories."