If it was in a top TPGS slab, I might consider it. Other than that, I noticed no bids. I ignor feedbacks. My son sells on ebay and has many friends give him great feedbacks.
Yes, they probably just bought $1 items for the feedback. Also, as far as the coin being a matte proof: I doubt it.
Proofs and matte proofs have squared rims, this does not, proofs also do not have weakness in the wheat stalks. Looks like a whizzed business strike to me.