As is, doubt it has much value if any real value for anyone due the amount of rust at present, an acid dip/blast & re-paint/renovation would remove all the rust, but you would be unlikely to recoup the cost of that, and any potential buyer would account for it when looking hence the very low value.
For the paint job, when you say custom, is this factory, or what someone has had done after?
As an addition, if you are riding this, replace the brake cable outer, you can see this has severe corrosion issues in the middle top photo.