So if you get another purchaser, you will have to issue new contracts to them. If you have a copy of the current contracts you may be able to do that.
But then you have to answer precontract requisitions, check a draft deed of transfer, answer a 44 page document called Objections & Requisitions on Title which has hundreds of title queries, draft closing documents, answer closing searches and close the sale.
Can you do those things?
Because the purchasers solicitor will not be able to help you and may even refuse to act if there is a hint that you don't know what you are doing.