Amazon gives non-Prime members free shipping at $35 or more of eligible items. Instead of simply letting users get the product with free shipping, they’ve added a discount that prices it exactly one cent below the $35 limit, while only subsidizing the price with $3.38, which is about half of what they’ll then charge you for shipping.
A few years ago I mused that we might see the day when eBay becomes a more trustworthy platform to purchase on than Amazon. I’m not sure when exactly the streams crossed but I think we are past it now