Back in 2016, Nintendo released the NES Classic Edition, a tiny replica of their first console that had up to 30 classic games saved into its memory. It sold out quickly, and then Nintendo announced that it would discontinue the product earlier this month.
Best Buy announced on Twitter yesterday that they would have some Classic Editions on sale today in limited quantities. Not every store will have them, so check your local Best Buy for more information. Given how quickly this product sold out the first time, it would be wise to expect history to repeat itself, and start looking right away.