I've had mine from inkoo for a while now and it's alright, it's definitely real leather and I'm pretty impressed with it - Not sure about them rigging the bids, though, they seem to be making a lot of mistakes if they are, I've bought two and I got them both for a few quid,
don't pay the buy it now price on his account, just bid on them until you get it for the price you want!
Either way, the important thing is the magnet is really strong, the whole latter end of the strap is magnetised, not just the end bit, which is great, here's a
video of mine, it isn't like the last abomination I bought where just the last section was a magnet and kept coming off!
It's comfortable enough and seems alright after a week or so of use. Sizing is generous, I've got about 60mm left on the strap and I've got massive wrists.
Only complaints are that the last section of the band is the same thickness as the rest so it doesn't stop itself from coming through the loop as a safety feature and that the blue is more like a black/very dark blue than the photos show, maybe it's my eyes
Edit - On a related note, and this is only my opinion, but these straps are apparently for both the 38 and the 42. Mine are being used on the 42mm watch and the straps taper to the width of the screen which is aesthetically pleasing to me, I'm not so sure they'd look as good on the 38mm.
And also a
real world photo of the blue on a space grey 42mm sport