Excellent,good,fair,reasonable etc condition are all subject to the individuals interpretation.It's all part and parcel of buying a boat,house,car,etc.
Convince yourself that this is part of the fun in the hunt.
That's what I do to stop myself from being the one that has reduced the worlds population by one when I come across those very people.
My tips to any sellers out there is be as honest and upfront with any item/object you may be selling including photos from every angle etc.
If only everyone did that it would minimise someone else's displeasure.
Cheers.