Is Steam card sold in grocery store?

I'm curious to know if Steam cards are available for purchase in grocery stores. As a frequent gamer and user of Steam, I've found myself needing to top up my account balance on occasion. However, I'm not always able to make it to a dedicated gaming store or electronics retailer. This has led me to wonder if there's a more convenient option for purchasing Steam cards, like at my local grocery store. So, my question is: do grocery stores typically sell Steam cards, or should I stick to shopping at specialized retailers?