this one looks to be good.... thoughts? and it's on sale for $15
can't tell if it has a spot for an ac adapter or not though
https://www.amazon.com/Smart-Weigh-Back-Lit-Features-Included/dp/B00ME8VI34/
Says it uses batteries, no mention of an adapter so I assume not.
Are you looking for something other than the 501? 501 includes adapter, bowl, cover and weights for calibration.