> Each store houses about 250,000 unique products. https://corporate.walmart.com/_news_/news-archive/2005/01/07/our-retail-divisions https://corporate.walmart.

> Each store houses about 250,000 unique products. https://corporate.walmart.com/_news_/news-archive/2005/01/07/our-retail-divisions https://corporate.walmart.com/_news_/news-archive/2005/01/07... "Supercenters average 187,000 square feet, employ 350 or more associates on average and offer 142,000 different items." > If they're $4 a peice (highly unlikely) looks like they're maybe $10 per on alibaba, in lowish volumes. > You also need to test different environments - will it work in freezers, coolers, and under heated lamps (150F temperatures)? they can just go check out any of the many places that already use such tags, and note that they work fine. > Do those places have wifi access? > Adding 250k devices to a network is not a small task. they use 433MHz ISM, and don't screw around with IP networking. here's an example device on alibaba https://www.alibaba.com/product-detail/Wireless-digital-price-tags-lcd-display_60338580763.html https://www.alibaba.com/product-detail/Wireless-digital-pric... > There's other factors to consider, but the math never shakes out positively. There are bigger fish to fry than price tags. they're used in hazel's in boulder, co. pretty sure i've seen them used in some other stores, though names aren't coming to mind at the moment.