The cost of LED channels can vary widely based on a number of factors, including their size, the type of materials used, the brand, and the specific features they offer.
As of my knowledge cutoff in September 2021, a simple aluminum LED channel could cost anywhere from around $10 to $30 per meter, while more sophisticated, larger, or specially-designed channels could be more expensive. It's important to note that prices may also vary depending on the retailer and the country in which you're shopping.
Furthermore, don't forget to factor in the cost of the LED strips themselves, which again can vary based on their type, length, brightness, color, brand, and other features.
Lastly, if you are not installing the LED channels yourself, you may also need to consider the cost of professional installation.
Given the broad range of LED channels and LED strips available on the market, it would be a good idea to research different options and compare prices from different retailers before making a purchase. This will help ensure that you find a product that fits both your lighting needs and your budget.