Weigh scale suggestions

I am in the market for a bathroom scale to weigh myself a couple times a week.
Currently I just weigh myself at doctors a couple times a year or at friends house if they have a scale in bathroom.
Does anyone have any recommendations? Some things that I should look for?
I don't care about looks, but just want an accurate scale for under $40. I also don't care about bells and whistles. Any ideas or suggestions you have I am all ears. I will now hang up and listen.