I'm glad the word is getting out about Hifiaudio. That guy is my first and only negative feedback on ebay in 25 years.
I bought two pots from him, one for my Sherwood S8000III and one for my Pas2 preamp. The Sherwood pot taper is whacked but better than the totally destroyed unit that was in the Sherwood when I bought it.
The Pas2 pot rear section shorted when it was turned past 1/4 volume. The guy told be I didn't know what I was doing and ruined the pot when I installed it, told me my test equipment was junk and wasn't reading the pot correctly. After three days of insults he agreed to take the pot back. I had a gut feeing that something was up so I put a pair of small Sharpie dots on the pot before sending it back. The friggin guy sent me the same pot back and the insults started again after i complained. I left negative feedback and opened an ebay case. Two days after I left the negative feedback it disappeared. How does he get the negative feedback removed? It isn't right!