Interesting ... but an eye-popping price.
Not trying to derail the topic, but I finally purchased my first track-cleaning car a month or two ago. Went with the Bachmann model, and have been pleasantly surprised by the results. Cost was around $35 at modeltrainstuff.com. Like it so much I recently bought another for about half that price on feebay.
(Robert3985 did a nice writeup on rolling your own masonite pad car
https://www.therailwire.net/forum/index.php?topic=58263.msg802661#msg802661but at the moment I'm better off spending the money than the time.)
I remain on the lookout for cost-effective cleaners ... so will be very interested in any reviews of this new entry.
Jim