"Adventurer's Vault" by Various
Published and distributed by Wizards of the Coast
ISBN = 978-0-7869-4978-6 224 pages
Adventurer's Vault (1) provides some sorely needed treasures for your D&D 4th Edition campaign.
Broken Down, it looks like this:
In the 1st chapter, Equipment, you find: Masterwork Armor, Masterwork Weapons, Vehicles, and Alchemy. There are lots of charts for all of these.
Next, in the 2nd Chapter, Magic Items, you find Magic Armor, Magic Weapons, Implements, Arm Slot Items, Companion Items, Feet Slot Items, Hand Slot Items, Head Slot Items, Neck Slot Items, Rings, Waist Slot Items, Wondrous Items, and Consumables. Yes, more charts here.
Appendix 1 deals with Unique Items, Item Level, and Enchanting Items. Some good higher level info here.
Appendix 2 is simply a huge chart (called a "master table") for all Magic Items in this book.
There are only about 16 pages dedicated to Equipment. However, at least 150 pages for Magic Items. There are only about 28 pages for both appendixes.
I was hoping that there was more to treasures than what was in the Core Rulebooks. This provides at least part of the answer. There's also a "Adventurer's Guide 2" with even more...
Although players can use this book, it is, of course, primarily for the Game Master. It contains literally thousands of new items for adding to 4th Edition. Thank the maker that someone had the idea to group the Master Table by Item Level. If you want to still DM using the 4th Edition, I'd say this was a no-brainer. GM's should try to limit player access to this book. If you're running 4th Edition, it has my recommendation.