There are also things on eBay with a starting price of less than a dollar with free shipping that never get bids. I "won" two auctions like this the other week for brand new USB-C cables, each of them costing me 13 cents shipped.

I have no idea why sellers would do this with eBay fees and USPS small package shipping costing well over 13 cents.

Presumably they are inexperienced sellers who haven't learned about reserve prices?

Now you're part of their education.

Or... they are sophisticated and trying to get a ton of relatively inexpensive positive ratings before selling things that are actually expensive?