Thank you all for your advice. I'm obviously a novice with sound and selling items. I will be posting more pictures, and if anyone would like to message me with more advice, it would be greatly appreciated.
Yes. 4000 for the pair. Working on uploading a picture. It keeps saying the file is too large. I do have a picture of one of them in another topic where I had help in identifying what I had.
Wow! It's so great to hear the good news! Given all of this information, I'm still on the fence about selling them. I am located in California, for those of you that are wondering.
A good friend of our family gave me some old Klipsch subwoofers from the 1980s I think. I looked to see if I could find a model number but all I have is the serial number. I'm not sure if I have the room to keep them and might want to sell them. Help!