This collection represent entire SA-10/SA-20 battalion and include 7 high detailed models. They are:

Radars:
Clam Shell ($170 for individual product), Big Bird ($160), Flap Lid ($140).

Launch Battery:
BAZ transporter ($140), Ural loader ($140), MAZ launcher ($115)

Command Post based on MAZ chassis ($120).

SA-10 and SA-20 Anti-Arcraft systems look same, so you can use the models for both. Save money, purchasing this collection.