@Maker_of_Things

I've had that happen a few times using Walmart and Target's online marketplace - usually at a small markup, so if I'm not buying what seems to be an independent retailer or the manufacturer, I'll just skip to Amazon, assuming it's being fulfilled by them anyway.

I don't mind so much when a manufacturer makes it clear that they use Amazon to fulfill orders, but I'm not paying them a premium in those cases.

Never had it happen with eBay, but the only thing I buy there is used test equipment, which seems to escape this problem.