Opinon on a good price for this used system

Hey all, was hoping I could get some input on a used system. I've Frankensteined up a computer from parts and had a friend interested in it but I'm not sure what to charge.

Thanks for any insight

System is outlined below

PCPartPicker part list / Price breakdown by merchant

CPU: Intel - Core i5-4670K 3.4GHz Quad-Core Processor
CPU Cooler: Cooler Master - Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler (Purchased For $0.00)
Motherboard: ASRock - H87 Pro4 ATX LGA1150 Motherboard
Memory: Crucial - Ballistix Elite 8GB (2 x 4GB) DDR3-1600 Memory (Purchased For $0.00)
Storage: Samsung - 840 EVO 120GB 2.5" Solid State Drive (Purchased For $0.00)
Storage: Western Digital - Caviar Blue 320GB 3.5" 7200RPM Internal Hard Drive (Purchased For $0.00)
Video Card: EVGA - GeForce GTX 660 2GB Video Card
Case: Lian-Li - PC-A05FNB ATX Mid Tower Case
Power Supply: OCZ - ModXStream Pro 600W 80+ Certified Semi-Modular ATX Power Supply
Optical Drive: Asus - DRW-24F1ST DVD/CD Writer (Purchased For $0.00)
Operating System: Microsoft - Windows 10 Pro OEM 64-bit (Purchased For $0.00)
Total: $0.00
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-12-21 23:42 EST-0500