My bass instructor has a Carruthers SUB-1 he is looking to unload. I have been thinking about an electric upright for silent practice. This one didn't sound too good to me, but I have a hard time believing I would like the sound of any EUB, so the poor sound is not of concern. I would only use this at home. Anyway, what do these sell for used? Anyone want to lend input? My other option is the NS Design WAV4. Thanks a lot.