FWIW, I purchased and already received one unit from this vendor, it's working well, and was shipped in the original packaging. Can verify it's the older SP20 vs the newer SP20E's I got directly from SPTech.
Have three more arriving on Friday - He accepted an offer I made him at a reduced price.
thanks for this note. I have glanced past that listing multiple times now. I think I will make an offer on a couple.