I agree with both Gib and Dan. I looked at a number of photos on Google and the edges all look very much like your photos above. So my guess is this is the factory edge – probably done on a narrow belt system without a platen behind the belt.
I think this would be an easy fix on your WEPS, Just start out gently, with a focus on the high spots until you’re satisfied that the edge is straight. I’d be careful not to over do it, as there aren’t a lot of resharpenings left in this knife, before you’ve weakened the blade at the finger hole.
If you have a good set of bench stones and know how to use them, a few straight-line passes on a medium India stone could straighten the edge in no time. Be really careful with the angle. Then finish on the WEPS.
Or maybe the customer (owner) isn’t even aware of the uneven edge, in which case I’d proceed normally and not be concerned with correcting the wavy edge.
I’m from a frugal background and I would have been put off by the $200+ price tag and the lack of “meat” between the finger hole and the edge. At 4mm thick D2, I suppose when you hold it in your hand it feels plenty strong, but there’s still a limited number of sharpenings in the life of this knife.
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