Yes the prices in adds must be different in different countries.
One thing what they want, then what people want to pay.
The CB bikes best values are in stock condition.
USA got most of them and seems to be possible to find for low prices
If original tank, side covers, 4-4, both fenders and gauges are missing.
Possible to calculate the other way.
A good looking stock K0 valued $12.000US?
What about all missing parts?
Not cheap to get.
The aftermarket parts not much value.
Unless the ISR parts are brakes.
I'm sure the MM bike I saw at a guys home is a fun memory of how they could look like.
I found a CB500 pic with the typical look. Rear fender missing.
I ordered a short fiberglass fender while they still had parts.
4-1 was usually a swedish Stigefelt. Foot pegs Raask, wheels probably Henry Abe.