Not exactly cheapest but I have been an absolute fan of Gallium charging bricks. They can do much higher wattage in a smaller size and with a long USB C cable and 4 ports actually replaces a laptop charger, phone charger, and more.

And specifically Anker makes a 65w charger that also doubles as a battery bank for about $80 that means I can charge everything from just that one and then take it with me and use it as a battery and plug I to the wall to recharge itself and my devices again.

One of those adjustable clasping tactical-style belts. I fluctuate in weight frequently so my belts never fit quite right. This is the only type that's done a respectable job of keeping my pants up. I just wish they made them in other colors.

Spending the little bit of extra money on Gold Toe socks and Dr. Scholl's gel inserts.

An egg slicer that you could also use to slice strawberries, whole pitted olives and other similar things.

It's so quick compared to doing it manually, and so easy to clean.

Replacing the battery in my ps5 controller instead of just buying a new controller. It was super simple to install and the batteries cost $17.00.

A new mousepad. I don't know how much it cost, but it was on the low end and I got it from a local book shop to replace an aging, unusable one last March.

It's serving me quite well.