You aren't telling us much about either boat, so it's hard to judge. But as a long time Californian owner, I can tell you they're a rock solid long lived boat. The 42', 79 Californian is an excellent rough water boat, twin diesel. nearly 14' wide and very roomy. I believe the engine options that year were Perkins 6.354's or 3208 Cats. The boats were built in Santa Anna, Ca. by Marshal, solid FG hull for open water boating.
Most were sold as a basic boats with options left to the dealer/owner to outfit. I've seen a few with very basic options, minimal electronics, no generator and even an ice box and alcohol stove. So you need to look at how it's outfitted to establish value. At $70K I would expect it to be fairly well decked out with generator, electric galley and full electronics.
Either boat needs to be survey prior to purchase. If you're looking for more info on Californian's, there is a Californian owners group on this forum and also look through some of the blogs that contain Californian specific information.
Careful . . .I Have a Generator and I'm not afraid to use it !