It's just $27.95 at fatbrain.com.
There's a great site called http://www.bookfinder.com
where you can get just about ANY book in mint condition, secondhand, at big discounts. It's a used book search engine, and it also finds the cheapest price for any new book.
Okay, this is not strictly related to Merc stuff, but as Merc owners, we need to save as many dollars as possible to keep our cars running!