Can The Collective help me find the value (if any) of these old records?

My sister gave me a box full of old records. When I say old, I mean that most of them are made for a Victrola. They are at least an eighth of an inch thick, have the name Edison on them with a picture of Mr. Edison himself. They have no RPM information, just the name of the songs and a couple of serial number type things. I want to find out if they are of any value, but I am not sure where to start my research, my old stand by – ebay – didn’t help a whole lot. Where can I turn? See how I did that, they are records and I asked where to “turn”?