I think this is the lowest price for this kit.
For those who are new to gunpla check out the links below that might help you.
EG, HG, RG, MG, PG?!
Gunpla Grade and Scale
If you are new to Gunpla, start with this guide.
The Gunpla Model Beginner’s Guide for Building Amazing Kits
There isn't a PG version of Barbatos is there?