I am hoping to get some insight from the numerous brilliant minds reading these forums [] Today I met a guy that after a long talk about some work related issues told me he had an older 2ch audio system that he had purchased in the early 90's that was taking up space in his basement storage room. I talked him into showing it to me and was surprised to see the following: 1pr Dunlavy SC-IV in a light oak finish, a Krell KSA-200s, a Krell MD-20, and a Audio Research LS5. He is interested in selling it all as a package and is waiting for me to make an offer but I honestly have no clue what it is all worth assuming it is in good condition. I only had limited time and couldn't listen to anything but cosmetically everything looked good. I'm just not familiar enough with the brands to make an educated offer. Any insight would be greatly appreciated, value and any common issues with this equipment that I should look for.