So as I posted in TEA last week, I bought an HP 3455A for a cool $160 shipped. It arrived, and I finally had some time to take it apart and have a peek at the innards to make sure nothing was amiss. Posted these pics in TEA, but this thing is so pretty inside I thought it deserved it's own thread!
Fortunately, with use, the buttons seem to be freeing themselves for the most part. Still a couple sticky ones that I'll have to disassemble the panel to fix, but that will have to be done later and in a cat-free environment.
I was frankly amazed at how clean inside this unit is. The boards look clean and unmolested. The line filter doesn't look like the exploding kind in that other thread. The AC board is the RMS and not the averaging board. Not pictured is the strap which covers the calibration ports on the analog lid; it is present, but I took it off for the picture. The engineering that went into this unit is really quite something, especially with the lengths they went to shield the analog circuitry from the outside world.
Bonus pic of the 3455A and my Fluke 87 agreeing pretty much exactly on output from a DC power supply.