Quite a few ways to save money online really. You can set an email notification system that will alert you when an item you're looking to buy suddenly gets a discount or goes on sale.

Another way would be to just ship in bulk. Instead of buying things one by one, you could just wait to order stuff online once you reach an x number of items to make the shipping fees worth it.

With tech-specific stuff–I love buying refurbished stuff. A good few hundred $$$ off a basically brand new and mint-quality.

One last thing is, I used to work with dropshipping suppliers–and that's one thing that helped me realize that a large bundle of products online are dropshipped. So, that's one thing that you can try and find out: see if you can find the original source of the stuff your purchasing online (if any).