Races of the Dragon Draconomicon Magic Item Compendium
I was holding off on these, but I finally decided to get them. Races I got to complete the Races collection, Draconomicon will be very useful to John's Dragon Shaman character in my game, and Magic Item Compendium I have wanted for a long time even though john has it I really would like to have a physical copy of it for DMing and even for playing.
Price wise the dragon books were $14 for Draconomicon and $22 for Races of the Dragon and Magic Item Compendium was a jaw dropping $60 after shipping. I couldn't find that one cheaper anywhere else online and no stores seemed to have it, that I could find, so I figured I might as well get it now in case it goes up more because there were quite a lot of copies online in the $100s.
Be glad you already have the Spell Compendium. I think that one is even more expensive than the Magic Item Compendium. Speaking of which, I'm glad you bought that because it means I don't have to carry my copy around anymore, and I can save some wear and tear on it.
Also cool that you completed your "Races of" collection (I'm missing Races of Destiny I think). Draconomicon was an interesting book from when I looked at the PDF, and hopefully you can make good use of it.