If you list an item, it strongly "suggests" a price. Sounds innocuous, right? However, when every seller knows they would be stupid to list a product for less than the suggested price, that means that eBay is enacting a collusion process on their sellers to regulate prices for products sold on their platform.
I don't think this is illegal in any way, but it is bad for the buyers as it decreases the chance that they will get lucky with a purchase and ensures that all purchasers on the platform spend as much as they can afford to spend.
Next, as a seller, eBay presents you with an option to "promote" your product, for a fairly significant percentage of eBay's suggested sell price. (Last time I tried to sell something, they wanted $9.99 to promote an item expected to sell for ~$150, for instance). If you do not "promote" your item, then it is thrown to the bottom of the listing and may be filtered out when purchasers sort by "price low to high" as they often do.
I chose not to promote my item as I was just getting rid of it, (brand new OEM toner for a printer that normally sells for $200) and it got almost no views and ended up selling for $40, of which ebay took $7.50 for their cut.
I checked the other solds for the same product and mine was the lowest sold by almost $100 all seemingly because I didn't pay the racketeer price upfront.
I didn't care about the money, I was just getting rid of it, and ebay punished me for not playing ball their way while also losing out on their profits just to make a point with me.
If you don't eBay the ebay way you will suffer for it.
Speaking of which, eBay has started changing the number of results based on your search filtering, preventing purchasers from finding the specific thing they are looking for in exchange for something that is often more expensive and not quite right.
Try it yourself. Search for something very specific and then change your filters and see the number of available items increases and decreases based on how you search. I honestly would not be surprised if they were hiding the unpromoted less expensive more accurate item you are searching for from you in the expectation of inducing you to buy the more expensive item in the process.
Why would eBay do this? They make more money. It's pure enshittification. They charge the sellers to promote. They set the prices. They charge an insane percentage, something like 15-20% of the final sell price to the sellers, and they have made the platform hostile to its original purpose of being a bazaar for ordinary people to sell their old stuff to people that might want them.
Of course, they are still seller hostile, they protect fraudsters who buy expensive items and claim they are fakes or broken and return bricks, and they have strongarmed their customers into arbitration agreements in an attempt to prevent anyone from suing them to stop their anti-consumer practices.
