Well majority of the base figures can be found using eprey, but I can give you an idea as I own some myself.
Spec 1: Depending on condition I'd say low of 250-400 give or take. I've seen them spike to over 500 but that was for some restored and or perfect pieces. If yours is decent I'd say a happy middle would be 300. It's a nice piece, also is there any issues cosmetically? Connectors tarnished? ect..?
Spec 4: I really like these units I've seen these go for around 500 give or take depending upon condition cosmetically and internally. Really nice examples that are working perfect can fetch 600 or more, but I've seen alot of people move and lust over the Spec 2 for the additional power.
TX-9500 II: Great tuner, as long as it's working and everything in sync I'd say easy it could bring 200 + to the right party. These however vary in price as I've seen them sell for 150 or 300 so middle of the road seems safe.
RT-707: If everything is working and recently cleaned/inspected it could pull in 100-200 give or take. The 909 is what many people also lust over, so it can vary. If there is no work and it's been sitting for awhile it's going to be on the lower end. What do you plan on doing with it?
I'm a big fan of the gear, ideally the spec 1 and 4, I'm always looking for more of those.
