Buyer wants partial refund

[eaug86]

I’m using EBay for the first time to sell my father’s vintage pen collection.  Most transactions have gone well with positive feedback. Since I am not a collector, my descriptions are not extremely detailed. The pens are listed as Vintage. My issue is with a buyer that is asking for a partial refund claiming there is some corrosion on a clip and a minute crack.  He sent blurry photos with his complaint. There was no visible evidence of this on my end. I replied explaining the pen was advertised as vintage and used, therefor I will not provide a partial refund. He replied pressing for a partial refund, but not requesting an amount. Is it in my best interest to offer him something to protect my positive ratings, or do I stop replying to his messages?  Thanks for any advise. 

[this*old*attic]

I’m a believer in partial refunds. I’ve both given them and asked for them (reasonable in both directions).

I’m a little surprised why someone would keep a damaged pen (as opposed to a chip in one of 8 glasses), but it’s still an easy way to make a problem go away.