Cars are depreciating very fast at the moment. I have my Octavia for sale. It was $45,000 in 2015 and I have it advertised for $14,000 with no takers, a lot of scammers and a few test drivers but no-one actually wants to buy it. I don't want a trade in so the local dealer said they would pay $8,000 for it but a a private sale they said it should go for $14000 to $16,000. Two years ago they said it would have got $27,000. Unfortunately I needed it two years ago. I gave it to my son and bought a Mitsubishi PHEV but he now has a company car.
You Jag certainly sounds like a bargain with only 44K km on the clock, my Octavia has 152,000km on it. Like your Jag it was probably the most fun car I have owned with a roof and I would rather keep it than the Mitsubishi but i have been told you have the MGB for fun.
I assume all the dealers have good stock of news cars so second hand car prices have died.