I have a (fairly recent) continuous movement clock from Ikea, battery-powered and most certainly inexpensive (they don't sell expensive ones and I wouldn't get that even if they did).

EDIT: I think it's $15 TJALLA[0] and it mentions "No disturbing ticking sounds since the clock has a silent quartz movement."

[0]: https://www.ikea.com/us/en/p/tjalla-wall-clock-silver-color-...