Ages ago I had mimicked the "overhead scanner" with a mounted digital camera, but now I'd go with a mounted smartphone + light bars + bluetooth photo trigger. Scrolling through Bezos' was pretty depressing in terms of cost/quality and even a $150 device seemed like a repurposed webcam, with a sole non-free confirmed buyer saying it died after 3 months while freebies praise it lol. As long as you don't scan drawings/designs/comic books - just set lights evenly and that'd be enough, and even moreso if you OCR it and turn a scan into an e-book where visual fidelity stops to matter.