Hummm, seems those who managed to score these at something a bit under half full price (after tax & shipping is added) have done rather well in this. Even though there are issues being reported, the basic unit seems as though it is basically sound, and it's just "the Devil in the Details" that has reared its ugly head, such as running backwards and the like. While disappointing from an engineering perspective, it is perhaps not the end of the world, as these were never meant to be put into actual service and run on an extended basis, but rather are just model representations of the type that will live the vast majority of their lives as static display models, for which they seem to be exemplary representations.
Just my $0.02 on the topic .... ;c)