My experience is the Oehler 35P is an excellent piece of equipment. It is a a little cumbersome to set up, but the 3rd screen is actually a feature that is not well understood. The 3rd screen is a check that throws out suspect readings. The printout is also nice unless maybe your whole life revolves around your cell phone. Oehler lists it on its site as in stock for $595. I'd buy it from them or get a much better price than $575 used.
I also have a magnetospeed. Its not the easiest setup in the world either unless perhaps if you only use it on one gun. IMO it is cumbersome setting up the sensor sleeve with the spacers on the end of the barrel. It gets to be even a lot more time consuming setting it up to different guns that need different spacers. Generally the setup on the end of the barrel changes harmonics and changes where bullets hit the target, though my experience with bull barrels is that it can be minimal if any, but I don't trust it anyway. All that said it is a compact piece of equipment, theoretically very accurate, is computer friendly and I generally use it these days over the Oehler.