I’ve just recently acquired some Tek TM500/other modular test equipment mainframe modules and have listed them on eBay for sale, thought I’d give you all a heads up in case it’s something that interests anyone here!
Please note that, as per the listings, these are all UNTESTED. They all appear to be in good physical condition and all the knobs, switches, etc. seem to function very well without any stickiness or catching. I don’t have a mainframe to plug these into so it’s not really possible for me to test them myself, unfortunately. As such, they are being sold as for parts/as-is.