I attended the hamfest in Phoenix last Saturday. I was able to pick up a TM506 with a DC503 and a PS501 all working for $40. Also 3 2430A along with 2 TDS320 and a TDS420 for $100. One of the 2430A are a 10,000 serial number (sad face) and the other two are 30,000+ . The TDS420 has leaking SMD capacitors which I'm going to attempt to change and possibly a power supply issue. One of the TDS320s fails acq self test on channel one, but the other works perfectly. After some cleaning and swapping some broken pots on the 2430A I am left with two working 2430A a working TDS320, a working TM506 and 50/50 chance of a working TDS420. The 2430A all appear to come from the Marine Corps due to the Marine Corps calibration stickers and the TDS320 have Naval Air stickers on them. I really like how the front panel just pops off on the 2430A I was dreading changing the pots with broken shafts but the way the front comes off is pretty slick and made the job painless. The SMD caps for the TDS420 should be here Thursday so I will know more then. Hope everyone is doing well and thanks for letting me share.
Brendan