You pay $200 or less for a 144Hz monitor with Freesync. It's not $600. It syncs properly and is easy to use. It's brighter than you've ever wanted. Colors are washed out and are likely to be inferior to a mid-range product. You buy a cheap monitor with a high refresh rate for gaming. You don't get quality for €600, but you definitely get it for at least €200.
HP 24Uh 24" Backlit Monitor 1920x1080p, 60Hz, LCD with HD Resolution - K5A38AA#ABA
101 Review
Dell SE2416HX Screen LED Lit Monitor 23.8", 1920X1080P, HDMI
93 Review
LG 27MP59G-P 27 inch Monitor with FreeSync, 75Hz Refresh Rate, and 1080p HD Resolution
93 Review
Samsung Flat Monitor Super Slim Design 27", 1920X1080P, 75Hz, Flicker Free
112 Review
Smartphone Samsung Galaxy A50 4/64 GB, 2 SIM, black
82 Review
Renewed Logitech G PRO X Wireless Lightspeed Gaming Headset with Blue VO!CE Mic Filter for Immersive Gaming Experience
122 Review
Enhance Your Visual Experience with Logitech C260 Webcam
78 Review
50AA2500 EBL Individual Battery Charging System - Rechargeable Batteries
56 Review