First, the Keithley is a very nice meter (looking at the specifications). My meters are Fluke, Keysight and Agilent but I do have past experience with Keithley and like their stuff. I don't have a decent vision system but use a cheap USB microscope ... works OK for hobby level work.
My frequency counter is a HP 5385A bought used. It works great but it did fail once. It was a just a filter in the power supply, so very easy to fix. There are lots of used counters out there. Were you looking to buy new?
My lab is overcrowded and I need to do something else now. I have added two DMMs since the photo was taken.