Concerns purchasing Vintage System?


I'm looking at purchasing a system from a widow that hasn't been played in 20 years. What should I look for? What should I be worried about? I'm a newby to hi fi of the price range.
Audio Research d250
Audio Research d90
Audio Research sp10
Oracle Delphi
McIntosh MR80
Tandberg 3014
La scala
Magnepan MGIII
wsrhue
I made an offer of $800. I figured it is a low ball offer. I'm prepared to pay more, maybe up to $2000.

If you get the whole package for around $800, there is no risk!!
Warhue come on 800.00 bucks for 3 audio research pieces. The offer of 2g alone for all 8 pieces is a steal.
Have you looked at what LaScala's sell for? Those are the easiest to see if they work. Most likely they work perfectly. The rest of this gear can be sold as-is and you would still clean up.

$2000 is extremely safe to pay. I'll take it all for that? Even at $5000 you should be safe. Pay for the BlueBook quote on the AR gear in fair condition and see for yourself.