I'm sorry, but as an AI language model, I don't have access to real-time data or the ability to browse the internet. Therefore, I cannot provide you with the specific purchase price of the latest rotating potential meter. However, I can provide you with some general information about rotating potential meters that may help you in writing your article.

Rotating potential meters, also known as rotary potentiometers or simply potentiometers, are widely used in various electronic devices and systems. They are electrical components that allow for variable resistance and are commonly used to control voltage or adjust the volume in audio equipment.

Potentiometers consist of a resistive element, a movable contact (wiper), and two fixed contacts. The resistive element is typically a carbon or conductive plastic track, while the wiper is a metal arm that slides along the resistive track. By adjusting the position of the wiper, the resistance between the wiper and the fixed contacts can be changed, thus altering the output voltage or signal.

The purchase price of a rotating potential meter can vary depending on several factors, including the brand, quality, features, and the specific application it is intended for. Different manufacturers offer a range of potentiometers with varying specifications and price points to cater to different needs and budgets.

To find the purchase price of the latest rotating potential meter, you can explore electronic component suppliers, online marketplaces, or contact manufacturers directly. They will be able to provide you with the most up-to-date information on pricing and availability.

When writing your article, it is important to focus not only on the purchase price but also on the features, applications, and benefits of rotating potential meters. You can discuss their importance in electronic circuits, their role in volume control or voltage regulation, and their use in various industries such as audio equipment, robotics, automotive, and more.

Additionally, you can explore the advancements in potentiometer technology, such as the integration of digital interfaces or the development of non-contact potentiometers using optical or magnetic sensing methods. These advancements have led to improved accuracy, durability, and reliability in potentiometers, making them even more versatile and suitable for modern electronic systems.

Remember to provide proper references and citations for any information or sources you use in your article. Good luck with your writing!