Sorry to hear about the bad luck with Ebay. It does pay to review a seller for negative feedback as Chef noted in his post. I believe there is a way to make a complaint directly to Ebay about this seller. I haven’t heard if this does any good though.
I feel bad for your wife getting stung like that. My wife bought me a sgian dubh for my last birthday. However , she let me pick it out so I went with Matt Newsome at the Scottish Tartans Museum and I was really pleased with the quality.