I’m a ham, VE8NSD. You can google my call sign. I used to buy and sell stuff all over the world. I’d be happy to give you a appraisal. I’m not interested in buying so I won’t low ball you.
But a few things up front. Be wary of internet “experts” who just look Up stuff on eBay, take the highest asking amount, and that becomes your value. Nope. If anything, go to “completed auctions” and see what stuff actually sold for, if at all.
Define “low ball”. Let’s say you have a radio actually worth $500. An offer of $200 or less is low ball. Around $300 is a shrewd buyer. Don’t sell for that, but you’re in the neighbourhood. Negotiate. At $400 and more sell it. Time is money, too. You could hold out for $500 for a long time. Greed is as bad as being a low baller. Don’t try to fix, clean, or restore stuff you know nothing about. You could do more damage then good. Don’t randonly poke at stuff, don’t try to see if stuff works unless you know what you’re doing. For example, old Johnson transmitters need to have a Morse code key plugged in at all times. Otherwise the rig starts to transmit as soon as you turn it on. If it doesn’t have an antenna connected that it is tuned properly tuned to you burn it out. Turning on a modern radio and pushing the mic button when there’s no antenna connected can burn out the transistors in the transmitter.
Anyway, I’m happy to offer good advice if you’ll actually use it. If you’re just shopping around looking for as many opinions so you can pick the ones you want I’m busy.