Buying a pc from craigslist which already tells you how acquainted I am with this topic. The same guy has the above two options for \\\$500. Which one do you think is better? Also, am I better off building one myself? Thanks a bunch!

Option 1

*Dell T5500 desktop workstation:

*Hexcore Intel Xeon X5690 processor, 6 core / 12 thread CPU 3.46/3.73 GHZ Boost.

*24GB RAM, triple channel mode.

*1TB SSD Drive

*EVGA SSC Nvidia GTX 1060 6GB video card, DisplayPort, *DVI, Fast gaming card

*DVD RW BurnerWireless adapter

Option 2

*Dell Precision T5500 desktop workstation:

*Dual Intel Xeon X5650 processor, 12 cores / 24 threads, 2.7-3GHZ Turbo GHz.

*24GB RAM in triple channel mode

*120GB SSD

*2TB SATA Hard

*DriveNvidia Quadro 1800 video card

*DisplayPort + DVI + HDMIMultimedia card reader DVD RW Burner