Initially, I had a single ULS 15 MK2. But, not long after I also bought a PSA S1500 and then another. I sold off the ULS-15 MK2 right after. But, I know I would have been just as happy w/dual ULS-15 MK2's as I was with the dual S1500's. My ULS-15 MK2 was a B-stock so it could not be sent back.
Back in the day, I also owned a Hsu VTF 3.3 and really liked it as well. Your offer of $600 shipped for a ULS 15 MK2 is a
total steal. Just wished I had some extra money right now. Unfortunately, I do not. However, I do wish you well with your sale. Be sure to list it on Audio Mart as it is free to do so.
Cheers,
Phil