Manual grinders will generally be better for the price.

No BUT manual grinders price for price will have better burrs. The only thing I suggest is not to buy a blade grinder. In coffee one key is consistency. Blade grinders (the type that sometimes you see doing dual purpose as a spice grinder or a coffee grinder) and while aeropress and French press can be more forgiving on inconsistency in grind if you ever get into anything like pour over it will create a pain point where getting consistent enough grinds will be a problem.

Think of it like this:you weigh your bean to the gram your water to the gram and you get the temp to a certain degree. A blade grinder will get you crushed up coffee beans but will not give the exact some size of those crushed parts. More expense spent on grinder will give you better consistency in that regard.

Now if you spend let’s just say 50 bucks on a burr grinder that’s manual more money is spent on the bits crushing your coffee and none spent on the motor spinning those bits.

I spent two years with a 100 dollar electric burr grinder I found at Best Buy on sale (I worked there) for 60 bucks and for aeropress, French press, and pour over it worked fine. There was times where if I was doing a v60 it would slow and stall for a bit but it was normally towards the end of the brew. If you ever up your game to espresso a grinder like that isn’t gonna cut it. The general rule of thumb is if you are kitting yourself out and your hard cap is 300 bucks I’d look at 100-150 for a grinder. I’d check for used Baratza Encores. A new model called the Encore ESP came out so depending on your area if people upgraded may be selling a good one for cheap. Also check YouTube. Kyle Roswell and James Hoffman have good grinder reviews and they range their prices.

If you are looking sub 75 bucks for a grinder I’d go hand grinder unless you can nab a discount or if you are brewing for more then one or two people