What's the explanation for the stuff I have up there for more than 15% above my competitors that sells in a day? A couple days? A week? Happens all the time, too.
Not everyone is shopping for rock-bottom price. Luck, reputation, listing quality, finding more than one item wanted from the same store, where someone will ship to, shipping options, and more all play a part that can easily make up for far more than 15% price difference.
15 or 18 months isn't the normal selling period for me, either, it was just an example of one of the things that can happen on a marketplace as large and diverse as eBay.
"Never going to sell" is a false statement when it applies to a 15% difference. If you really want the last word on that, take it, but I've been selling on eBay for nearly 16 years now and I have the stats and experience to know that I'm absolutely right on that.