The minimum price that an old laptop can have is $100, I really doubt that it can exist a model cheaper than that. In this case, it's more likely to order a laptop for parts rather than a reliable notebook. As far as I could observe the cheapest laptops ever, either refurbished or used, are [...]

Warranties are essential, either you purchase a new or refurbished laptops. From my point of view, a minimal warranty has to be promoted even for used laptops, although they are considered to have passed the test of reliability, since several users performed daily tasks with their help. Refurbished Laptops With Warranty (Source: img.ehowcdn.com) The necessity [...]