NuBe Advice needed

We just inherited some older higher end equiptment (think McIntosh MC352 era). We would like to keep a setup for ourselves, and sell some to pay the taxes. What is the best way to do that?  I am so nervous about how not to get burned, and making sure it gets to where it's going without harn. I know we will have to have someone come to help set it up. Any advice?