Cheaper possible build?

[EndlessZone123]

So another day someone gave me this build (below). I was wondering if it could be cheaper possible with a ddr3 mother board and ram. It there anything you guys can change for me to make it cheeper? Could any of these be worth it as second hand? I need it to be under 600aud preferably.

P.s I live in Australia and the best place for parts it umart.

https://au.pcpartpicker.com/list/6jd6Fd

 

[Isokolon]

That's pretty much the cheapest possible.
You could go for a cheaper case.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Pentium G4560 3.5GHz Dual-Core Processor ($75.00 @ Mwave Australia)
Motherboard: MSI B250M PRO-VD Micro ATX LGA1151 Motherboard ($99.00 @ Mwave Australia)
Memory: G.Skill NT Series 8GB (1 x 8GB) DDR4-2133 Memory ($73.70 @ Newegg Australia)
Storage: Seagate BarraCuda 1TB 3.5" 7200RPM Internal Hard Drive ($60.00 @ Centre Com)
Video Card: Gigabyte Radeon RX 460 2GB WINDFORCE OC Video Card ($129.00 @ Umart)
Case: Deepcool TESSERACT BF ATX Mid Tower Case ($48.00 @ Scorptec)
Power Supply: Antec High Current Gamer 520W 80+ Bronze Certified Semi-Modular ATX Power Supply ($99.00 @ Umart)
Total: $583.70
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-04-25 19:06 AEST+1000

 

[need4speeds]

Crossfire board. However you will need a molex to pcie adaptor to add a 2nd RX470 later on and maybe some case fans.
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Pentium G4560 3.5GHz Dual-Core Processor ($75.00 @ Mwave Australia)
Motherboard: ASRock B250M Pro4 Micro ATX LGA1151 Motherboard ($109.00 @ IJK)
Memory: Crucial 8GB (2 x 4GB) DDR4-2133 Memory ($85.00 @ Umart)
Storage: Seagate BarraCuda 1TB 3.5" 7200RPM Internal Hard Drive ($60.00 @ Centre Com)
Video Card: Gigabyte Radeon RX 470 4GB G1 Gaming Video Card ($259.00 @ Mwave Australia)
Case: Antec VSK3-500 MicroATX Mini Tower Case w/500W Power Supply ($77.00 @ IJK)
Total: $665.00
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-04-25 19:40 AEST+1000

 

[need4speeds]

Extra $10 for a Crossfire board since it's almost certain a 2nd used RX460 is the future..

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Pentium G4560 3.5GHz Dual-Core Processor ($75.00 @ Mwave Australia)
Motherboard: ASRock B250M Pro4 Micro ATX LGA1151 Motherboard ($109.00 @ IJK)
Memory: Crucial 8GB (2 x 4GB) DDR4-2133 Memory ($85.00 @ Umart)
Storage: Seagate BarraCuda 1TB 3.5" 7200RPM Internal Hard Drive ($60.00 @ Centre Com)
Video Card: Gigabyte Radeon RX 460 2GB WINDFORCE OC Video Card ($129.00 @ Umart)
Case: Antec VSK3-500 MicroATX Mini Tower Case w/500W Power Supply ($77.00 @ IJK)
Total: $535.00
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-04-25 19:32 AEST+1000

 

[need4speeds]

Sometimes Cheap is not always a good value.. So i went $115 overbudget..

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Pentium G4560 3.5GHz Dual-Core Processor ($75.00 @ Mwave Australia)
Motherboard: MSI B250M PRO-VD Micro ATX LGA1151 Motherboard ($99.00 @ Mwave Australia)
Memory: Crucial 8GB (2 x 4GB) DDR4-2133 Memory ($85.00 @ Umart)
Storage: Seagate BarraCuda 1TB 3.5" 7200RPM Internal Hard Drive ($60.00 @ Centre Com)
Video Card: GALAX GeForce GTX 1060 6GB 6GB OC Video Card ($319.00 @ PLE Computers)
Case: Antec VSK3-500 MicroATX Mini Tower Case w/500W Power Supply ($77.00 @ IJK)
Total: $715.00
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-04-25 19:29 AEST+1000

 

[need4speeds]

If you select the cheaper Asus Strix RX470 and then look at the site, it says PREORDER. So you could be waiting until the RX680 is out.
It's the reason for my 3rd build because the GTX 1060 6gb totally leaves the much slower RX470 eating dust.

The budget antec power supply only has a single 6 pin pcie power connector. There is a mid-tower atx version for $82 if you wanted the larger version of that case instead.