There is a binding contract on the fall of the hammer.
If the person hasn’t paid, then it’s a matter for the Small Claims Court.
Not expenses, but not quick.
You need to tell the bias that they have until 4 PM on Friday the 18th, to pay up, failing which you will issue Small Claims Court proceedings against them without further notice. No point in hanging around.
www.moneyclaim.gov.uk is quick and easy. You can prepare the proceedings now, and save them online ready to issue them whenever a deadline for payment (you have to give them a deadline in writing and it has to be reasonable period to pay up) expires.
If the damage was too expensive to repair, that’s unfortunate for the buyer. They should have inspected it more thoroughly. It doesn’t matter whether you described it or not.
It’s up to you whether you put it into a future auction or whether you pursue the existing buyer but if it’s going into a future auction, you may get less for it and/or you need the auctioneer to waive their fees.
If you put it into a future auction and the auctioneer will not waive their fees, you would still be entitled to take the original buyer to court for whatever this cost you and you lose in the second sale.
Can I clarify anything else for you?
Please note that my answer is based strictly on the information that you have given me. If you have not given me all the information, then my answer may be incomplete or wrong.
I am happy to answer any specific points arising from this.
If you still need any points clarifying, I will be happy to reply because the thread does not close.