$150 does sound 'fair' for a nice operating and looking Sansui 7070 receiver. If it is a 'really good' one. You have to look at it and test it first.
But...What does ' good ' mean ???
Good means different things to different people.
One's person's good could be 'really good' for you!! Or one person's good could be someone else's total garbage or nightmare.
If 'good' means 'really good', or really nice...That's really good.
If 'good' really means 'not really so good', or good with problems...then it's absolutely ' No Good '.
If you really,
specifically, want a tuner incorporated in your amp, a 7070 is a plus, if you listen to the radio a lot.
Do you really want a receiver?? Or just a great Sansui amplifier? That's the major question.
If you really don't care about the
tuner section in the receiver all that much...better Sansui amplifiers (without a tuner, not a receiver) can be purchased for the same amount of money, 'or less', or $50 to $75 more, like a Sansui
'87-'89 AU-X701 'Vintage' series. It all depends on what you want and what you really need. If all you need is an amplifier...an AU-X701 would be a nice one to get. And it's only 24 years old. And it 'sounds audiophile'. Just saying. I've seen them sell for $96 to $225 on eBay, but it's an amplifier, no tuner (radio).
You really need to see the receiver in person and test it out.
1. WHO is selling it? Is it his 'personal amp' that he doesn't listen to anymore and just needs the money?? Or is he 'flipping' it?? If he's flipping it, he has no idea what he has or how it really works. (I bought an AU-717 that was flipped...it worked for 7 months and then became a costly mistake.)
2. Ask him 'why' is he selling it.
3. Ask him what the problems are with the receiver. Even minor problems. If he's straight up he will tell you the truth, because he knows, because it's 'his' receiver. He knows. Feel him out on that.
4. Check it out first. Let it warm up real good too (15 minutes). Check all the funcitons, then check them again. Just play with it for awhile. It can be done quickly once the amp is warmed up.
5. Has it ever been in the shop for repairs or upgrades (or downgrades, yeah, chop jobs). I.E. is it stock or has it been changed.
5. Older amps/receivers may need maintenance, like capacitors, resisters, transisters, or whatever it is. Maintenance isn't cheap. Gotta keep that in mind too.
Now if he's not willing to go any lower than $150...that may be a good thing! Cause the receiver...Good!! And he knows it!
Hope this helps.
Good luck!