well steel is about £180 per ton, but unless you de-pollute it (fuel, oil, hydraulics fluids, battery acid), strip out all the things the scrapper would need to pay landfill tax on – tyres, all the interior (which costs the yard £48 per ton to dispose of) etc, then you’ll get less than that. Call your local yard and ask what their rate for ‘dirty scrap’ is. All the non-steel bits are worth more if you could be bothered to separate them out – copper from the wiring and motors is nearer to £1800 per ton, but if its mixed with anything else – ie the copper wire is still inside the steel motor – you’ll only get the price of the cheapest element
Apparently some of the bigger scrapyards can find thousands of pounds each day just by fishing out loose change from the glove box and under the seats, so you’ll realised more quids for your effort doing that. To be honest steel is so cheap you need to be weighing in an awful lot of it to make it worth the bother of doing it yourself.