I don’t know too much about 3DBuzz, but based on a quick search, Jason Busby, the man operating 3DBuzz.com, died of cancer back in 2017. Out of their kindness, they have released all the contents for free. Someone has made a torrent out of it here: https://archive.org/details/3dbuzz-archive
Since my main focus here in this blog is concept and design, both 2d and 3d, I found a set that is relevant for this blog: Creating Compelling Character Concepts.
Creating Compelling Character Concepts
In this series, professional concept artist and illustrator Tyler Edlin will walk you through the workflow needed to create pro character designs like those used in AAA games and major films. Through the creation of a Fantasy Mage called Kari, Tyler will demonstrate a professional workflow, as well as covering all of the design considerations needed to create concepts from scratch, and why design is so important to artists in these fields. By the end of this course, youâ€™ll be armed with all of the tools you need to design compelling, complex characters that make sense within the world they are created for. Tyler also includes his personal Photoshop brushes, as well as the final .psd file for you to deconstruct and review.