I wouldn't have left negative feedback personally.
Last item I sold was an old leather jacket I had. I mentioned in the description that there was a tear in the lining, and took pictures of it for the auction. It went for 99p plus a few quid for P&P. I gave the buyer good feedback for prompt payment, despite making an overall loss when I came to post it, and being sore about letting a nice jacket that I'd paid £100+ for new go for less than a quid. The buyer followed it up with a neg feedback, saying he felt the condition was poor due to damaged lining. Maddening. Sometimes, as often in life, people that you meet are just total idiots.