What is the opinion of Reddit about the
FEZIBO Standing Desk with Drawer, Adjustable Height Electric Stand up Desk, 55 x 24 Inches Sit Stand Home Office Desk, Ergonomic Workstation Black Steel Frame/Rustic Brown Tabletop?

Seriously, you’re going to pay as much for a good chair as a standing desk. I have this one. It’s fairly inexpensive and motorized. They have cheaper ones too.

https://smile.amazon.com/dp/B08D74BP3C/ref=cm_sw_r_cp_apa_glt_fabc_V0RHSV00E6R152RX2ZEB?psc=1

Option B would probably be to get a ball to sit on. Also, in my experience, most chairs don’t help.