Hi ouc,
I'm new here too, and only know what I'm about to share with you because I just read about it in the posting rules myself, but linking to active eBay auctions is a no-no here at BFC and will get the kind of attention from a moderator that you don't want.
To answer your question, I'm not familiar with the makers of that product, but if a quality veggie tanned leather is used, it's pretty difficult to muck a strop up.
Hope this helps,
Taylor