The Amazing Spider-Man: Ends Of The Earth has only just started publication today. But the hardcover collection of the crossover is already on Amazon for a whopping 65% off. $10.41, that's over $19 off the full $29.99 price. Eight or nine issues worth of Amazing Spider-Man for less than the price of three issues.
This is cheaper than any retailer could order it, it is probably cheaper than Amazon sell it to Diamond, it is certainly a lot cheaper than Amazon will actually buy it for.
Especially when you consider it includes postage.
Amazon have to be making a loss on every sale, especially since it hasn't come out yet, so it's not like they are clearing stock. Hell it hasn't even been solicited yet, it doesn't come out until August.
Which means this price won't last for long.
Retailers? Stock up now. Other books yet to be released, at a similar discount, include Avengers: X-Sanction hardcover,