Ray's right, that is an awfully high price for no larger an antenna than it is. It does more or less work work at LF, based on a couple of YouTube videos I've seen, one of which is linked here:https://www.youtube.com/watch?v=FN7l1MVKvZg
However, the only LF example shown in this one is RTE on 252 kHz as received in the UK, which is not a particularly remarkable feat. And, I have an innate bias against antenna makers who use the term "magnetic loop" inaccurately, not to mention the bogus history of it that AOR's website offers.
The first question I'd ask myself is whether I really need a loop antenna or not. If you have sufficient room outdoors and only average noise sources to contend with, one like the LF Engineering active whip Ray recommends might be a better (and certainly less expensive) choice. If you're stuck having to use an antenna indoors, or even outdoors but with noise sources that are going to need directional nulling, then you may indeed need a loop.
If you do, the next step on the decision tree is, tuned or untuned? The AOR does offer remote tuning, but that's also one reason for the price--plus, you may also need the (optional, extra cost) extension cables, depending on where you plan to locate the loop itself. Retuning for each new frequency gets old pretty quickly. If you've got strong local mediumwave broadcasters, you may require a tuned antenna to prevent intermodulation products from wiping out parts of the longwave spectrum. If not, then I'd strongly consider an untuned amplified loop.
One very good untuned loop is the Wellbrook ALA1530AL. (Although I also take exception to their erroneous description of a loop responding "mainly to the Magnetic Field." That is not how they work.) It's physically over three times the diameter of the AOR, 1 metre (in Brit-spelling) instead of 1 foot, for ten times the capture area. Unlike the AOR, it can be mounted outdoors...for instance, on a balcony railing or a fence post. It costs roughly a third less, too, so if it's not physically too large for your installation, I'd look into it if I needed a loop.
https://www.wellbrook.uk.com/loopantennas/ALA1530AL
John