I was rather intrigued by Marvel’s Omnibus format, but most of the volumes were priced through the rough, so getting one was a daunting task. But there are a few decent ones that are relatively cheap on the Amazon marketplace and eBay: The Avengers Omnibus #1 was one (at the time of this writing, the John Carter and X-Statix tomes are also relatively cheap).
This particular book is bascially three Marvel Masterworks editions enlarged and sewn together. It even includes Stan Lee’s moronic introductions from those original books. What is interesting is that the publisher added the original letter’s pages for each issue in the book, which I thought was a very nice touch. The final pages feature some reproductions of uncolored/uninked artwork, as well as the first twenty or so covers to Marvel Triple Action, which had originally reprinted a lot of the stories in this book, and Avengers Classics.
The reproduction is excellent and the book is predominated by the artwork of Jack Kirby and Don Heck, both at the near-apex of their careers and creative abilities. I’d have to recommend this one just for that fact. This features the original Avengers, and the adventures of the second team, known as “Cap’s Kookie Quartet,” so don’t expect the movie version of the team (for that, go find the Ultimates trade paperbacks).
This book can be expensive; it retailed for $99.99. But you can usually find it in the $25-50 range. Often, it will be more economically sound to buy this than the original three Masterworks, especially factoring in shipping.