The cost of buying new aluminum coil versus recycling old ones can vary significantly based on several factors including market prices, quality of the recycled material, and the cost of recycling processes. Generally, recycling aluminum is more cost-effective as it requires less energy and resources compared to producing new aluminum from raw materials. The cost of recycled aluminum can be as low as half of that for new aluminum. However, the exact cost will depend on current market conditions and the specific requirements of the aluminum coils in question. It's advisable to get quotes from suppliers and recycling companies to determine the most economical option for your specific needs.