$13
Amazon link: https://www.amazon.com/dp/B07Y3ZS47V?psc=1&ref=ppx_pop_dt_b_product_details
Higher-resolution images: Open in Google Slides
Fully functional, 2nd-hand product used for 4 months, pairs one device at a time, has number pad, uses batteries, no backlight, no stand.
On campus; accepting cash & venmo.
Please do not message this poster about other commercial services.