My office setup is:
-Herman Miller Embody Chair. (A true lifesaver! Don't buy these online, go to a local distributor to save a fortune)
-Amish built-in desk
-Dell XPS i9 9900K with 64GB RAM (Lots of tabs!)
-3 HP 27" FHD monitors. (Maybe upgrade these to higher res with Dell credits, any recommendations?)
-Logitech MX Keys Advanced Wireless Illuminated Keyboard (Great keyboard!)
-Logitech MX Palm Rest (Fantastic for your wrists)
-Logitech MX3 (Best mouse by leaps and bounds)
-Fellowes PlushTouch Mouse Pad and Wrist Rest (Fantastic for your wrists)
-Bose QC35 (Essential for quarantine).
-Tripp Lite Surge Protector
-Samsung Note10+, wireless fast charger, and 45W ultra-fast charger.
-Hydroflask 40 ounce with straw cap to stay hydrated.
What's yours?
Gotta be careful not to sound like you're bragging/showing off. If you tell us that you got it all for pennies, then at least it'll be the right kind of bragging/showing off for this forum.

My setup has degraded considerably going from work to home, especially since my basement is being refinished, so I'm set up in my dining room temporarily.
Chair - Work: Herman Miller Aeron; Home: Dining room armchair
Desk - Work: Motorized sit/stand desk; Home: 4ft height adjustable Lifetime table
Keyboard/Mouse - Work:
Logitech K350/
Anker Vertical Mouse; Home:
Logitech MK270 comboMonitor(s) - Work: Dual ~24" [don't remember brand/specs] monitors + 14" laptop screen; Home:
LG 29" FHD Ultrawide 21:9 [+work laptop screen sometimes]
PC - Work: Lenovo T450s [~5yrs old but fully loaded back then - been meaning to get a company upgrade sooner than later]; Home: Entry-mid level desktop [put together myself from components for dirt cheap]
Headset - Jabra Pro 9465; Plantronics
Blackwire C720 +
MDA220 [Still have both and used them at different times at work and home. Both setups allow me to connect to and switch between the PC, office phone, and cell phone (bluetooth) simultaneously. All were bought used on eBay for dirt cheap.]