Ah the beauty of ebay.
Had the 'cracked' excuse many a time before now, as well as the 'grading was not as good as I advertised' excuse.
Not to mention having a different record by the same artist arrive (usually crap and worthless) to be told that the item I won was out of stock, so they have sent an alternative...
However, on a few rare occassions, the following has happened.
When the seller has offered me a refund of my payment, I have accepted, but told them to keep the shipping cost and post the item to me anyway.
They turn up, and guess what......lovely condition and no cracks etc...