Walmart offers this L-Shaped Desk with Side Storage in White/Sonoma Oak for $57.15. Opt for in-store pickup to cut that to $54.06. (Amazon charges the same with free shipping.) That's the lowest price we could find by $28 and the best price we've seen. It features two open side shelves and cabling slots.
Amazon offers Prime members the Furinno Compact Computer Desk in Black for $22.91$22.54 with free shipping. That's the lowest price we could find by $13, outside of the mention below. It measures 39" x 16" x 34".
A close price: Walmart has it in Light Cherry for $24.35 $25 via in-store pickup.
Walmart offers the Flash Furniture Glass Computer Desk for $65. To drop the price to $62.40, opt for in-store pickup. (Amazon charges the same.) That's the lowest price we could find by $14. It features a pull-out keyboard tray and tempered glass top.