I agree, at least he isn't trying to hide anything, but that is far more than surface rust I can see there, which means it's likely hiding in a lot of other places too.
You definitely need more pics than that. If that’s all the corrosion seen, I would get it, take a metal brush to it and put some good zinc primer and paint on it. The axles aren’t very rusty, or the brake hats, I wouldn’t be worried at all yet.
I would take a look in person myself. If it wasn’t critical, I would definitely consider buying it.
That looks far from irreparable, but it will likely need a bit of work. Could be anywhere from blasting it with fluid film and forgetting about it to spring cup replacement. Most likely a sand and paint job.