The collection includes:
The Challenger 2 MBT Great Britain
polys 133 607
The Leopard 2A4 MBT Germany
The M551 Sheridan USA
The Type 98 MBT China
The K2 Black Panther MBT Republic of Korea
The T90 MBT Russia
Each model is listed separately for sale on TS. If purchased separately, the price for all models is 1030$. The collection price is 730$, so by buying the collection you save 300$.
For detailed info and more images, please download the accompanying .pdf file.