They could go used but it can be a real risk, it's bad enough for an individual to find they've been ripped off, but for a company that will rely on the system its not, in my opinion, worth the risk.
OK, here's an Intel i7 8700K build:
PCPartPicker part list /
Price breakdown by merchant
CPU: Intel - Core i7-8700K 3.7GHz 6-Core Processor (€331.51 @ Amazon France)
CPU Cooler: Scythe - Mugen MAX 97.2 CFM CPU Cooler (€49.48 @ Amazon France)
Motherboard: MSI - Z370-A PRO ATX LGA1151 Motherboard (€114.47 @ Amazon France)
Memory: ADATA - 32GB (2 x 16GB) DDR4-3000 Memory (€351.23 @ Amazon France)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (€42.23 @ Amazon France)
Case: Phanteks - Enthoo Pro M ATX Mid Tower Case (€89.90 @ Amazon France)
Power Supply: SeaSonic - 520W 80+ Bronze Certified Fully-Modular ATX Power Supply (€68.61 @ Amazon France)
Total: €1047.43
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-05-15 17:16 CEST+0200
Please bear in mind, not all these parts may be available in Slovakia and you may incur extra taxes or tariffs if you purchase from out of the country.
Yep, it's a full on i7 8700K 6 cores and 12 threads, maybe a little slower than a Ryzen 2700X but the out-of-the-box stability and reliability are excellent, also, unlike Ryzen builds it will not be as fussy about the memory you use, making it very unlikely you'll have any compatibility issues.
That big Sythe cooler isn't an absolute 'must have' but if you're going to run the system under heavy load for extended periods I'll recommend this one or something similar.
Cheap, serviceable motherboard, I don't think you'll want to risk any stability issues by overclocking so this will be just fine with a stock CPU .
Yep, 32Gb of fast DDR4 3000 RAM!
Changed the case to something a little larger.
Good, solid power supply but it's nothing special.
Forgot to add a couple of extra 140mm fans! The Phanteks only comes with one rear fan installed, a pair in the front will keep things nice and cool.