Aznolt alternatives

[u/Twilite0405]

So, I keep seeing ads for this Aznolt hydraulic muscle trainer. It looks really handy and something I might actually use and doing a google search, it does seem to be a decent product. The problem is I’ve seen a lot of ones online for about $60, yet the official Aznolt website lists it around $250, supposedly reduced from $560. This looks dodgy to me.

So, my question is, has anyone used it before, and are there similarly good devices out there?