Are you sure you don’t want to keep it???
All I got with my house was a minging fridge and a some dodgy carpets.
To be honest if you are going to shift it on I would do as found, any buyer will more than likely give the car a service and thorough going over prior to returning it to the road. Cars like this can be money pits, you start off as a light refurb and then get sucked in.
Re sale you might get some interest here. There is only one for sale in the uk currently (after a very quick google) in Lancashire and the owner wants £17k however it has been hot rodded and turned in to a low rider. In the US they look to be going for around $15k in stock condition.
Their are specialist forums/ clubs that can help shift it. Plus there are a few speciality sales sites.