I personally think you should sell it privately ASAP. Obviously, get a WBAC and Motorway price if you haven't done so already. If you have, what's the numbers?Ordered a MY SR MSM 19’ (Geminis to come off at the showroom !!)
Now what’s my white Nov 19 SR+ worth 57k miles in a private sale ?
Wilson's auctions near you?
It's not expensive, run it through there with a reserve price you want to get. You probably won't get it but what you'll get for the small fee is an indication of what dealers would pay.
Watch your auction like a hawk and try and see who bids. You can go chat with them if it fails to hit your reserve and maybe cut a deal there and then as if you do it private, dealer saves on auction fees
Oh, and wear a Tesla hat or a I love Elon t shirt or something
Make it as obvious as you can that when it runs through the auction, it's your car. Someone might approach you after the auction.
Overall, if the auction fails, it's a small price to pay for a true price indicator and you can then sell it privately for the auction price max bid plus 1 or 2 extra £k
That's what I would do.