Model #1: 323
Model #2: 465

What should I pay for each one? The seller wants no less than $250 for either one, so $500 for both or $250 each. Is this a good deal?

 

I would take a 323 only if the seller gave me $50 to haul it off. If the 465 works, the $250 is not too unreasonable. That was a top of the line o'scope back in 1970 or so. I would want a demo that both channels work and give the same display for the same signal. Do you get probes with it?

 

What make and model?

If you're referring to a Tek 465, that's not a bad scope at all from what I have heard, but it's not worth $250.

 

If you're willing to spend $500, you can get a reasonably good new digital scope for that amount and a used Tek or HP for around that amount. The 465 was a good scope back in the 70's, but they're all getting pretty long in the tooth. Personally, I'd rather have a 25 MHz digital scope than a 100 MHz analog scope because the ability to save waveforms and capture transient events is very useful for the type of stuff I do. YMMV.

 

I don't know, I'd prefer the 100Mhz, because if it is a repetitious pattern then I can see it with one scope and not the other, including really fast narrow pulses. With fast digital signals like ECL you don't need to see the edges, just the logic levels. I used the devil out of them, if they are working they are really good scopes. I figure they are worth around $100-120 used. I am spoiled, and a HAM. They regularly show up and HAM events for around that.