$300 each

My guess is that you had a family member / friend that died and left it to you.
You want to pawn it - but don't want to get took.

Amateur radio is the only place I know of where a person has a 40 year old radio and wants every dollar they paid for it when it was new.

None of the radios you have is supported and in every instance, there is better radios available today that does more for a couple of dollars more.

From time to time you might find some old fart that will pay any amount of money to get a radio to replace a radio they once had, but those people are getting few and far between.

Newer hams today do not want to spend any money and trying to sell HF equipment to them is harder then trying to find hen's teeth..