These stores have hosted pre-orders for the NES Classic and SNES Classic in the past.
There's a chance that Nintendo is working with similar – or even exactly the same – vendors to host pre-orders for the NES Classic.
For now, before Nintendo's official announcements regarding NES Classic pre-orders, you might as well follow the Twitter accounts of the following stores to see if they announce NES Classic pre-orders.
- Amazon
- Best Buy
- Game Stop
- Walmart
- Target
This Twitter user was also on point for announcing when and where the NES Classic and SNES Classic were becoming available.
Check out this site that tracks products stocks throughout several stores, and set an alert for when the NES Classic becomes in stock.
Go to nowinstock.net and sign up to get alerts when stock of the NES Classic becomes available.
From the site, you click the "on" button for the in-stock alert, which should alert you while you keep the site open in your web browser. The site automatically updates every minute.