For Sale/Trade Maestro phase shifter PS-1A

I bought the unit and found that the previous owner had messed with the trim pots. After fiddling around with them a bit I was able to get it back to sounding like it should. The unit works perfectly fine. I'll try to post a vid and more pics later on today. It's in great shape considering it's age. I would like to trade for a Darkglass Vintage Ultra or a B7K, but cash would be good too. $275 includes insured shipping to anywhere in the lower 48. Thanks friends.