The 3 runners?
You have enough time and no bids so best to end all the items, relist them together, as one listing and one postage price as a Buy it Now item
On the Seller Hub, and using a laptop / PC sorry I do not use the app, tick the little box left of the item, scroll up to Actions tab and select End item.
Are you still going to post the items? It will be a courier charge I would imagine because of the weight, mayb expensive, make sure your buyer is happy to pay this new price.
One more tip as you will be messaging the buyer the actions you are taking make sure you make it very, very clear you are removing the items to list them again for the buyer to buy from your eBay listing. eBay read all messages going through their system, make sure this does not look like an off eBay sale.
@ricardoclee