Nah bro, Transit 5B-5 still talks in an operational manner even though it's not controllable anymore. It was launched in 1965 as part of the pre-GPS satnav system. LES-1 is also from the same era and still yaks at times.
Transit's data isn't very interesting to listen to, but LES has a carrier that whines with it's tumbling. https://www.youtube.com/watch?v=6JLow8wO-2I
very interesting, ill check it out.
I guess "technically" Oscar-7 still is the only one useable for it's original mission. It's in the right orbit, but it's not powered 24/7 due to falling out of the sun's view.