BartPetersNeths Do you have picture of the car that you can upload?
How many miles are on the car?
Has any body restoration work been carried out? Do you have pictures of the underside of the car and of any restoration work while it was being done?
As you're aware, ES models don't attract the same prices as an 1800E or a P1800.
JFYI, I purchased a 1972 1800ES just over a year ago here in Australia for $42,000 AUD (about 23,240 EUR at present), and the car had been for sale for some time before I put my money down. The body restoration and paintwork is flawless, the trim is mostly good, and the interior is original but quite good.
If your ES is in very good condition, that's the sort of money you could expect from a sale in Australia, but bear in mind the cost of shipping the car from NL to AU, which you'd have to deduct from the figure above. I have no idea of the costs to import a car from NL these days - it was about $5,000 AUD to import my 780 from the USA, but that was over 10 years ago.
The Australian buyer will also need to obtain import approval for the car before trying to import it. Before export, I'd imagine the buyer will want to make sure there's zero traces of asbestos, because the Australian import inspectors are quite ruthless these days with vehicles they suspect may contain any asbestos.
If I haven't put you to sleep (or put you off) with all that, your best bet for online places to sell your car over here would be, IMHO -
The Volvo 120-1800 club website - https://www.volvo1800-120club.com/
Volvo Club of Victoria website - https://volvovic.org.au/
The CarSales Australia website, but it may have geo-location blocking - https://www.carsales.com.au
Other people may have some better suggestions.
Good luck with sale, and hope to see some pictures.
