Skates are more expensive than cleats. Hockey sticks break or are grown out of, and decent ones are a few hundred bucks.
But if priced low-to-high the senior skates on that site start at $64.99 and go up from there. Assuming that the lower cost skates are not worth it, you get what you pay for and all that, what's wrong with the middle tier skates that are in the $100-$200 range? How long do they last once a kid's foot doesn't outgrow it every 3-to-6 months?
You also have to invest in padding, helmets, gloves, socks, and so on.
I didn't consider the maintenance aspect; the need for sharpening makes sense though.
Cheap skates are like cheap running shoes. Yeah, they get the job done until the ill-fitted skates don't offer proper fit and support. Your kid is fine for a month, then they have welts from the cheap insoles and twisted ankles from no stability.
Just wanting to skate at the rink is one thing, practicing and chasing pucks on top of learning edge control demands proper equipment.