A good list can be found here:
http://bitcoin.directory/ (I believe that Newegg is no longer accepting bitcoin though). You could also buy from sites like Amazon without the need of having them to accept bitcoin directly, just use Paxful to buy gift cards and redeem them on the site.
Or you can use Purse.io to buy from Amazon and also you can get discount there.
Hi,
Here is a list who currently accepts Bitcoin as payment.
-snip-
Quite small list. There are much more companies which accepts Bitcoin. And you aren't telling exactly what OP needs, because he asked only for websites to buy gadgets and electronics with bitcoins.