Exactly. I have the same "problem", and in fact I buy my own books at that price! But remember, these are for print copies. The whole point of reisssuing the books as ebooks is that you open the market to people with ereaders.
I've always found it strange, though, that some of these books are offered at prices like $100. Do they seriously think they will get buyers at that price? I mean, what's the point? Either you want to sell or you don't.
Hope springs eternal. Enough buyers confuse price with quality that some online booksellers will try to charge ridiculous prices, in the hope that someone, somewhere, eventually will bite.
(I have friends and acquaintances who run secondhand bookstores, and we chat about this sort of thing).
I think the penny prices are to suck buyers in, like grocery stores selling milk at a loss in the hopes people will buy other things. I've noticed the penny sellers always charge high shipping fees, so the customer pays about the same, or more, than if they'd bought from someone charging more for the book.
Some of the high prices are caused by cross-Atlantic programming weirdness. A book offered by an independent bookseller in the US for $X is offered in Europe for $2X. If the algorithms pick up that same copy from a European site, they will offer it in the US for $4X. This can produce bizarrenesses like the same bookseller offering the same copy of a book at radically different prices on the same list.
Book sales have always competed with their own secondhand market. Some people prefer secondhand books because they're cheap, some like vintage books and first editions. But many people also like shiny new books, or books unsullied by others' cigarette smoke and dirty fingers, or the latest cover art, or neat new formats.
I wouldn't fret about it.