I sold a fridge/freezer to a guy. I have a 100% rating because anything I sell, I sell ethically, knowing that the 2nd hand item is great value and in great working condition.  This guy emailed me saying the door wouldn't shut after he'd driven about 100 miles up the road. I tried to give him some advice but basically the fridge was perfect when it left my house. He is now demanding his $75 back or will give me a bad review.

Can others please tell me what they've done in this situation or what is best for me to do? Half of me says, just give the money back for peace and to keep my 100% rating; the other half says, I don't really know whether he's scamming me.

What do you think?