Switch from Wi-Fi to mobile data to see if the issue is with your local network.
If you are currently unable to access the site while it is "up" for others, the following steps often resolve local issues: best buy site down
A major internal system failure briefly affected both online channels and in-store operations. Switch from Wi-Fi to mobile data to see
Overloaded caches can cause slow loading or "Page Not Found" errors. best buy site down
Some retail sites block certain VPN IP addresses for security reasons.