What to buy: try to avoid CNC mills without real spindles; if you need to get one, ask the manufacturer about TIR. If they are not sure, it's an obvious red flag: the parameter can be trivially measured with a $50 tool, and is one of the most rudimentary things to examine when designing a mill.
Hand-powered devices have been used for millennia. However, during the last quarter of the 19th century a radically improved generation of tools appeared. These tools took advantage of modern mass production machinery and processes (like interchangeable parts) and an increased availability in superior material (metal instead of wood).