I think I was the other person that grabbed it from the eBay auction. At ~$7 CAD shipped they're quite a bargain. I thought I would be let down as sometimes I get worked up on reading reviews online
But I'm actually quite impressed with these little things. The pads are really nice, not the really crappy type of disintegrating pleather, very comfortable; I usually hate supraaural cans. I might have a big head, but they sit really comfortably on my head, quite firm but not too tight; I remember when I had the px100 that was a partial issue, if I turned around hard enough, they could fly off. The other being that I didn't like how the PX100 sounded, I actually prefer these, but that's probably because I don't like the warm sennheiser house sound. Also these have a decent amount of bass. They kind of get muddled on really bass-heavy tracks but its quite respectable given their diminutive size and price-point--same with the soundstage, seems wide for being closed. Although these are 'closed' cans they are definitely not isolating, can hear people or sounds just in the vicinity. I guess the marketing stuff says semi-open? That might be a good thing should a person want to use these as jogging cans.
Only did some brief side-by-side testing with my K601s. I do have the KSC75, but I'll get a chance to compare them later when I get some time. I think the KSC75 will edge these out in most music though just owing to their open nature. With a bit of EQ'ing the JVC can reproduce respectable low level bass, more so than the Koss. As the poster above mentioned, build quality seems questionable. They have an nice metallic color, but the housing seems like it might crack easily if pressed on or hit hard against something. And I'll keep an eye or ear rather, out for the driver succumbing to bass rattle--nothing so far.
All in all, I think this is a good buy below $20. I'd say if anyone wanted an ultra-low budget setup, they can get this and the KSC 75 for an open+closed combo under $20-30 depending on sales. Now, I just have to turn these over to my gf who I actually got them for
Maybe get some pics up as well.