You can fill an entire wardrobe with kmart clothes for $100, it’s cheaper and more practical than even op shops most of the time. Maybe just don’t buy your shoes from there.
Bottle sauces and seasonings can last a long time, and can dramatically improve the diversity and quality of your home cooking. Basic chicken, rice, and greens can be turned into a dozen different dishes depending upon the sauces.
Avoid subscription services like the plague.
There’s always a few exceptions, but name brands are rarely worth it.