The NADA blue book shows it worth $640 in fair condition and $910 in good condition. Don't know what those figures mean in the real world but it's a place to start.
I too don't know what they mean in the real world, whether these numbers come from sales or insurance data. Kelly bluebook lists its trade in value at $905 and typical dealer list price at $1570. My thinking was I would go up tp maybe $1500 if I really liked the bike.
I went to see the bike today. The bike was very clean, cleaner than the pictures. The seller told me he had just finished cleaning it up. He had it for 10 years. I had a feeling the bike was a bit too tall for me. I am short, about 5'5". Forget about flat footing, I could not even touch the ground with both my toes at the same time. He offered to let me take the bike for a spin. Didn't even ask for "cash in hand". I must look respectable. I told him there was little point in taking it for a spin as at the moment, I was hesitant to drive it home 40 miles away. Driving it in the neighbourhood is fraught with unforeseen dangers. It's been a few years since I have been on a bike. He offered to drive it home for me. That was very nice of him. He really wanted to sell it. He had back surgery in April. I had open heart surgery in August. I think I need t get back into biking slowly. I have not built up my upper body strength fully as Covid19 has interrupted my physical therapy so much that I can't get more than one appointment every 5 weeks.
What follows now might be a bit OT: On my way home, I looked at a Yamaha VStar 650 classic. The seat height was a bit too low for me, felt even lower than my Blvd C50, although specs indicate otherwise. This owner too offered to let me take the bike for a ride before money exchanged hands. It was very hard to steer the front wheel. I didn't think my upper body was so weak. Then I noticed the air pressure was very low in the front wheel. Once we pumped air into the tires, it was easy to turn the wheel. I might not have been able to steer the bike had I not noticed the low pressure! I didn't get that bike either, as he was asking $3500 for 2001(800 miles). We couldn't agree on a price.
My first bike was 1980 Honda CM 200T that I bought new from a dealer in 1984 for $798. It's seat height is 28.5 inches according to specs. It was vandalised in 1990, battery ground cable cut, ignition switch destroyed. I have no idea why they did that. They could have simply stolen the bike. I was really busy then. Then kids came, out of state jobs, got busier, lots of travel and the bike just sat and sat. Now I plan to rejuvenate it. The Gas tank looked pretty good in 2017, just a spec of rust. stil had gas that looked and smelled like gas. The squirrels had made a nest in the airbox. The air filter foam is pulversied, and the engine is frozen. In the mean time, I need a bike.
Which Honda twins from the 70s and 80s and have low seat height? I really don't want to buy a new bike. Nor do I want to spend a lot of money.