$400 will buy you a lot of Unitrak. While on the surface, they look similar, the Bachmann system is a far cry from Unitrak when it comes to reliability. The clips break, and then all you have is typical snap track with regular joiners. You'd be better off with flex and do it yourself ballast (fewer track joints, fewer opportunities for electrical or alignment problems.
If a roadbed system is your bag, then get Unitrak. The joiners are engineered to be more reliable both mechanically and electrically. I'm not much of a fan of its appearance, but since I started doing TTrak modules, I'm pretty pleased with its performance.
There's a reason that guy is dumping the Bachmann track. You might ask him why that is. My guess is that it wasn't being used or was replaced with something better.
Lee