Estate Sales

It really all depends on the company and how they sell , I personally have found that it's a lot easier to find records of the public then it is to buy them from major estate companies. I personally sell record at my sale depending on the record if the stuff Is just ok I sell them dirt cheap . So go out there and hunt any questions don't hesitate to ask.
Palmspringsestatesales.com 
Sandiegocountyestatesales.com 

I know that our group is gray haired. Or does everybody know what our stuff is worth , and sell online ?
Jeff

Jeff, regarding Vinyl or CDs you or anyone can check sales history of every release on discogs.com and it will give you an idea of going rate for almost any record if you will find them in discography, basically discogs.com is huge database (discography) for records, cds etc (any genre of music). This is how you can make sure what people are ready to pay for particular LP for example. You can always list your vinyl or CD on discogs (all you need is to find particular release and click one button, picture and all details already there in discography). They charge 8% sales fee in 30 days after your item sold. What they are buying on estate sales will be there for higher price :) 

I check craigslist ....  word of mouth...   my brother went to one last week and bought an Acurus 200 x3 for 150 and a Velodyne has 15 for 195

I picked up a nice Fanfare FT 1a tuner for 200 today....