$50
I am selling a standing desk converter for $50. It has been used for only three months, is in excellent condition, and functions perfectly.
You can find the description here:
https://www.amazon.com/gp/product/B078WXFS6Q/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Let me know if you are interested.
Please do not message this poster about other commercial services.