VMInnovations offers the Xec-Fit Adjustable Height-Convertible Sit-to-Stand Desk Riser for an in-cart price of $119.99. Coupon code "MRXQY4C" cuts it to $79.99. With free shipping, that's $17 under last week's mention and the lowest price we could find now by $20. It rises from 5.9" to 17.9" and features dual gas springs, a 32 x 20.7" desktop, and sliding keyboard tray.
You don't need to hire a contractor or do extensive renovations to add value to your home.