The guards at the gate had no problem letting Reimu in, especially when she mentioned that she wanted to spend her gems.<br/><br/>The alchemist was just starting to pack up his cart, but was happy to take whatever time Reimu needed.  He let her know that he could identify potions for only five gems, but that even his skills weren't perfect, so he couldn't promise 100% accuracy.  He also sold potions that would enhance strength, speed, smarts, or stamina for fifteen gems a draught.  He made sure to add in that they were guaranteed to be corruption free.  Finally, while it took a lot of time and energy, he could craft a potion that would remove corruption.  For a hundred gems, but he'd need payment before he could begin crafting it, because it was so difficult.