Apparently the parties agreed that the buyer would have the right of inspection and the option to purchase. How long the buyer had to inspect and exercize the option we don't know. We also know that the seller withdrew the right to inspect and the option to buy, and if we assume he did so prior to an agreed upon deadline, then the seller is at fault. If the buyer incurred a loan expense prior to the deadline, then the seller should be liable for that expense. However, there is so little detail about the terms on this sale, assigning liability to one party or the other is impossible IMO.