Small anecdote ( I know I know - the plural of anecdote is not data and data is not information; information is not knowledge; knowledge is not wisdom.)
A few years back I purchased my garage gym from a warehouse in Altona.
I found them through ebay but noticed they also had a physical store at the warehouse. So I just drove out and perused their showroom.
When picking it up I asked the bloke why he listed on ebay auctions.
He said the vast majority of ebay sales were a significant way above his standard store price he advertised at and very few were ever below the standard price.
His standard store price was easily found by a simple few clicks and/ or a search.
Don't tell me this is why real estate agents (those honest, reliable men and women) usually prefer to sell houses at auction rather than set a price?