I've wondered the same thing. They are a moderately large company, so maybe a way to get rid of refurbs which may not be a large number relative to production. They aren't advertising this anywhere. I tripped over it by accident.
With good companies refurbs on some type of gear is a great thing. Someone personally checked it out and confirmed its performance. In the early days of digital cameras, there were still some fiddly adjustments to the optics. Refurbs were better because someone made sure it dead centered the optical performance they were shooting for. I wouldn't think any such fiddly bits exist in this digital audio gear anymore.
Besides there is a 30 day return if not satisfied. If Amir does his testing quickly, and it falls miserably short of the spec, he could return it for a full refund. If not, he probably could resell it nicely as he would have confirmed its goodness. Amir would be extra QC.