You do not wait for payment, you accept payment, a bank transfer preferably for that large amount of money, when the buyer comes, inspects and collects your lovely motorhome, payment is exchanged then.
Your buyer may be waiting for you to message them now with all contact details for them to come, collect and pay.
Do not worry too much if you do not hear today, being a weekend, and with the sun shining your buyer may not be in contact with their eBay account.
However, if days pass with no contact give them a polite deadline to respond otherwise you deem the item to be unwanted, and will be cancelling the order.
Here, select Buyer requests to cancel which will refund you your seller fees, but listing fees will have to be paid, they are non refundable, payable sale or no sale.
If they become a non payer, block them here from returning:
https://www.ebay.co.uk/bmgt/buyerrequirements
If you do relist the item, look to selling it in a Classified ad format, the listing fee is a little more at I believe £19.99 but there's no seller fee to pay when the vehicle sells.
Here's all you need to know about Selling with classified ads: https://www.ebay.co.uk/help/selling/listings/listing-tips/selling-classified-ads?id=4167&st=12&pos=1...