PCPartPicker part list: http://uk.pcpartpicker.com/p/cHMq23
Price breakdown by merchant: http://uk.pcpartpicker.com/p/cHMq23/by_merchant/
CPU: Intel Core i3-4160 3.6GHz Dual-Core Processor (£85.25 @ Ebuyer)
Motherboard: ASRock H81M-HDS Micro ATX LGA1150 Motherboard (£36.35 @ Ebuyer)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory (£42.50 @ CCL Computers)
Video Card: MSI Radeon R9 380 2GB Video Card (£156.99 @ Ebuyer)
Case: BitFenix Comrade ATX Mid Tower Case (£33.82 @ CCL Computers)
Power Supply: EVGA 500W 80+ Certified ATX Power Supply (£31.99 @ Amazon UK)
Case Fan: Cooler Master SickleFlow 69.7 CFM 120mm Fan (£5.24 @ CCL Computers)
Case Fan: Cooler Master SickleFlow 69.7 CFM 120mm Fan (£5.24 @ CCL Computers)
Case Fan: Cooler Master SickleFlow 69.7 CFM 120mm Fan (£5.24 @ CCL Computers)
Total: £402.62
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-06-28 09:00 BST+0100
What I'm thinking, (already have a hdd) could go up to £450 and willing to buy used.