If you have decent freezer space, there’s no excuse to not use a vac sealer. I have so many friends that constantly complain about meat prices but don’t take advantage of buying meat on sale in bulk. With a vac sealer, you can really get ahead. Also processing and preparing your own meat products (burgers, sausage).
We also vac seal soups and broths!
Also, on the topic of slow cookers, while not $50 and under, a ninja foodi is a pressure/slow cooker and air fryer combo. I literally use mine everyday. It gets more use than my microwave or stove.