I plan to list for sale a rare vinyl record with a Buy It Now price of (probably) £500.

I'll be paying for the postage, not the buyer.  I'd feel much more comfortable paying for Special Delivery than Simple Delivery, for the assurances of it being handed over in person with a signature etc. as it's extremely rare and may be impossible to replace.

I've just got the following suggestion from Gemini AI on how to get around the £750 barrier for Special Delivery.  Is the below correct?

How to use Special Delivery as a Private Seller:

Even if the listing forces a "Simple Delivery" label on you, you are not legally or contractually forced to use it if you prefer a more secure method. Here is the safest way to do it:

1. In the Listing: Select "Royal Mail 1st Class" or "Simple Delivery" as the default, but in the item description, write in bold:

   "POSTAGE: This item will be sent via Royal Mail Special Delivery (Guaranteed by 1pm) with full insurance up to £2,500. This is for both buyer and seller protection. I will cover the extra cost of this service myself."

2. After the Sale: * Do not use the eBay-generated QR code or label.

   • Take the parcel to the Post Office and pay for Special Delivery over the counter.

   • Once you have the receipt, go to your eBay "Sold" folder, click "Add Tracking," and manually type in the Special Delivery tracking number (e.g., JS 1234 5678 9GB).

3. Why this works: eBay’s system will recognize the manual tracking number. As soon as the Post Office marks it as "Delivered" the next day, your funds will be released. You are fully protected because you have a signature and high-value insurance.