I don't know either party, and so am not judging the intentions, honesty, etc., of each. And, usually, such disagreements are due to honest miscommunication by both parties rather any bad intentions, but . . .

Verbal contracts may suffice for face-to-face transactions, but have no place in online transactions. And, specifying an inspection period in writing, and then limiting it in a non-written way (i.e. verbally, etc.) is misleading to the Buyer.

Another perspective is that the Seller is free to write the conditions of sale any way he wants. Therefor, it is the Seller's responsibility if terms are omitted from the writing, and the Buyer is not liable for the Seller's omission.

JMHO, etc.

--shinbone