Sounds like a great deal! I kept bugging my LHS about the Truggy and I love to build so he gave me a ZO1-B to build a few weeks ago. I built it and it's for sale at the shop. I did not actually run or convert it but we did have a guy at our track this year who had one and that made me know it was the direction I would move in. It was quick and strong. I've been running Truggy and MT, I may switch to buggy this year, if I do I will get my own ZO1-B.
I've really wanted to get a buggy for a while and was always interested in the Z01b because of the drivetrain. From what I understand it's the freest and lightest on the power source that you can get. I figured that would be ideal for brushless where efficiency is key.