My third 856x spectrum analyzer, this one initially thought to be an 8568a, turns out it is a 'B' model that sat in a closet since 1985 when it was last calibrated. Cables included. I open it up to tweak the CRT and it is perfectly clean, all the nuts and bolts are there, cables perfectly routed and not falling apart. It has a sticky button or two on the display unit and the RF unit has a coating on it I can't get off. And as my kids used to say, "needs a battery" but the calibration constants are near spot-on and DOBA (that's an industry term).
I paid $175 plus the guy drove it from Boise to Tahoe where I picked it up. This has to be a record low for a functioning 8568B or even an 8568A, which is on the cover. He overlooked the - 01K option that adds the 'B' processor and other hardware an d documentation.
One of these I am going to add the SimmConnLabs LCD to, maybe my 8566b, but the 8568s have such low noise and most of my playing is in HF. Had to get my son to help lift it into the rack, these things are real beasts.
Jerry