Yes. I think the decent thing for Amazon to do would have been to have a simple button for used copies, without listing prices, on the new book page. Still, the used dealers generally charge a fortune for shipping and then put the books in media mail, which means you may not get them until 3 weeks later.
The used dealers don't charge a fortune. Amazon charges $3.99 per book for shipping, and takes about a dollar and a half cut of that, so the used dealer loses money on shipping by media mail (which is "standard shipping") if the book weighs over a pound. And bubble envelopes are 30 cents each in bulk.
Media mail generally takes a couple of days, but it's mail that's handled last, and the post office doesn't consider it overdue for a month. "Expedited shipping," aka priority mail, is $6.99.
I never buy used books through Amazon. Never. I distrust them, due to their "available new and used from $0.01" link that appears for books that were released ten minutes ago. I use ALibrus, which serves as a clearinghouse for many used book dealers. It's sometimes a pain when ordering multiple books, as I try to cluster then into as few sellers as possible to save on shipping, but there's a lot of stuff there, and I've always been treated fairly.
Alibris has pretty much the same set of used book dealers as Amazon but fewer of them because it has less traffic for almost the same monthly rent. Its shipping fee for a book is the same as Amazon's, and it also takes a cut of the shipping fee from sellers. Their advantage to buyers is reduced shipping fees for additional books from the same seller. Biblio and ABE allow sellers to set their own shipping fees, and you may (or may not) catch a break there.