What is the most valuable electronic product you know?

High-end smart phones: High-end smart phones usually have advanced technology, powerful functions and great brand influence. For example, flagship phones of brands such as iPhone and Samsung Galaxy usually maintain high value in the market. High-performance laptop: For users who need to deal with complex tasks or professional work, high-performance laptop is a value-added choice. For example, Apple's MacBook Pro and Dell's XPS series are all popular high-performance notebook brands. High-quality audio equipment: Audio equipment usually has a long service life, and high-quality audio equipment maintains a high value in the market. For example, Bose, Sonos and other brands provide a series of high-quality audio products. Digital camera: Although smart phones already have the function of taking pictures, professional digital cameras are still the first choice for photographers and professional photographers. For example, professional digital cameras of Nikon, Canon and other brands maintain high value in the market. It should be noted that the value of electronic products is affected by market supply and demand and technological progress, so the degree of value preservation may change. In addition, keeping the products in good condition and maintenance is also a key factor to preserve value.