Sadly, lots of them are now $13, up from the flat $10 that Amazon used to charge for all best sellers.

可惜的是，其中许多书现在都要 13 美元了，本来亚马逊的畅销书定价是 10 美元平价。

youdao

"We mainly choose best-sellers and books which are worth reading," Xu said. "If Dangdang and Amazon are the Walmart of the book sector, we are more like 7-eleven-speed and convenience is our thing."

徐智明说：“我们主要选择畅销书以及值得一读的书籍，如果把当当和亚马逊比作书店行业中的沃尔玛，那么我们就好比是7 - 11，主打的是快速和便捷牌。”

youdao

Amazon sold many books, particularly best-sellers, for little more than the wholesale price, or even at a loss.

NEWYORKER: Publish or Perish

Books sales are flat, discount super-centers like Wal-Mart have gobbled up half the best sellers and no one touches Amazon online.

FORBES: Booking Losses

When it became clear that Mr. Martin had never heard of him, Mr. Howey told him his novel was No. 6 on Amazon's list of science-fiction and fantasy best sellers, behind Mr. Martin's five books.

WSJ: Wool: Sci-Fi's Underground Hit