The conversation between human and AI assistant.
[|Human|] In the given scenario, recommend an appropriate range for the cost of the item.
[|AI|] Based on the needs and purchasing power of the customer, an appropriate cost range for a small appliance like an air purifier would likely fall between $50 to $200. Within this range, they should be able to find a reliable and efficient air purifier that will meet their needs without straining their budget.
[|Human|] 
In the given scenario, recommend an appropriate range for the cost of the item.