15-10-2020 10:15 PM
Use Buy It Now Only format with variations. Details here:
http://pages.ebay.co.uk/help/sell/listing-variations.html
You'll probably need to use the advanced selling form, rather than the quick one or the app. If your default is the quick one the link to switch is top right of page after clicking on Sell. And it's not possible with some categories, eg. magazines are not included.