Much more expensive? I got mine for $7 on a Gearbest sale. Looks like it's a smidgen under $9 now, but that's still a good price: http://www.gearbest.com/on-ear-over-ear-headphones/pp_436717.html?wid=21
Haven't tried the Tenmak Pros, can't comment on that.
Sorry, perhaps I was not clear. I was talking about how expensive Tennmak Pros are when compared to the ZS3s.