If I were looking to buy an unrestored vintage receiver like yours, I’m going to assume it’s going to need some work or at least preventative maintenance. Assuming you’re not tech savvy and location, finding a competent person to work on it can be an issue. Based on experience, I assume it will take at least $300 to have the minimal amount of work done to make it reliable. That’s a ball park figure that can increase rapidly depending on what is needed. Just my $.02.