Apple Wireless Keyboard - good working condition

Apple Wireless Keyboard

• battery powered
• connects via bluetooth
• good working condition: works perfectly fine, but some keys are slightly discolored from use (see picture)

https://en.wikipedia.org/wiki/Apple_Wireless_Keyboard
Fourth generation (A1314) MC184LL/B (2 batteries)

Compare to this refurbished model:
https://www.amazon.com/Apple-Wireless-Keyboard-Bluetooth-Refurbished/dp/B0146YF1FO/ref=sr_1_11?dchild=1&keywords=Fourth+generation+%28A1314%29+MC184LL%2FB+%282+batteries%29&qid=1633672337&sr=8-11#renewedProgramDescriptionBtfSection