How can I make this build significantly cheaper?

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4460 3.2GHz Quad-Core Processor ($166.95 @ SuperBiiz)
Motherboard: ASRock H97M Anniversary Micro ATX LGA1150 Motherboard ($64.99 @ SuperBiiz)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($46.99 @ Newegg)
Storage: Hitachi Deskstar 1TB 3.5" 7200RPM Internal Hard Drive ($40.50 @ Amazon)
Video Card: EVGA GeForce GTX 960 2GB Superclocked Video Card ($184.99 @ NCIX US)
Case: BitFenix Prodigy M Arctic White MicroATX Mini Tower Case ($95.99 @ SuperBiiz)
Power Supply: Corsair Builder 430W 80+ Bronze Certified ATX Power Supply ($29.99 @ Micro Center)
Total: $630.40
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-07-08 20:25 EDT-0400

a fraction cheaper . But improved in some critical ways IMO

The case is identical externally but with the Prodigy M you get a better range of expansion options