As komikskolektor mentioned, Aldi supermarkets currently have one on sale for around $70. The brand is Medion and a google search for Medion Graphics pad comes up with lukewarm reviews. The 'pen' part requires a battery to work.

I was considering it, but I might go instead with the low end of the Wacom brand and get a Bamboo Fun which is double the price but from the company that's the market leader.