I previously posted a poll asking if you worked sitting down, standing or a combination of the two.
For those that think adjustable desks are outrageous and out of your price range, don't be afraid to think outside of the box. You can go to HomeDepot and buy a manual "Adjustable Height Work Bench Table". Having 4 different sizes to choose from, hopefully you can find what is right for you. Did I mention, it only costs $179 for the 42" and the largest 72" is $279. https://www.homedepot.com/p/Husky-46-in-Adjustable-Height-Work-Table-HOLT46XDB12/301809931
Have a great day and happy selling while being comfortable!