Here's mine I love them.
2 4.5 digit .05%dmms not auto ranging but meh
2 20 volt +/- current adjustable power supplies with tracking plus 5 volts fixed
11 MHz function generator
100 MHz counter/timer
Used to drool over a setup one of my grandfathers friends had like this when I was a kid.
The first picture is how I bought it from eBay.
The second is with the frequency counter I bought to add to it.
The third picture is showing the function generator set at 1KHz feeding into the frequency counter.
The fourth is one power supply set at 5 volts feeding one of the dmms.
The fifth one is the other power supply set at 12 volts.
The pictures don't do it justice all of it is like brand new the original plastic shipping sleeve covering the handle is still there even.
If I remember right I gave around $300 US for the whole deal but I waited and looked and looked till I found one with most of the exact modules I wanted.
But if you can afford it I would try to find an tm5000 series as the modules are a little better and a bit more modern compared to the tm500 series.
Go here it will tell you about every tm500 and tm5000 series module made as far as I can tell.
http://www.barrytech.com/tektronix/tektm500/tektm500.htmlThe 500 series modules will work in the 5000 series power bay but the 5000 series modules wont work in the 500 power bay so if you buy a piece at a time I would get a tm5000 series power bay.
@BravoV
So far I can say is they are still spot on when I powered it on at the 1st time, the signal accuracy is amazing considering they are > 30 years old.
Mine where pretty much spot on to.