If that's the one I saw, it actually went unsold the first time it was listed, then sold with only one bid. I wondered the same, why are people fighting over an 8 bass one, and ignoring the 12 bass. MAD indeed.
Yes, I looked back the completed listings and it's the same one. It didn't register on my radar first time round - I wouldn't have been interested at the price asked (nor anyone else, it seems).