How do you go about selling large speakers?

+1 to CL or even OfferUp. 
AudioGon people probably don’t know this, but mint condition CV speakers actually sell for a pretty penny. Look on eBay. 

Sell your house, include your speakers as immobile fixtures.

Thanks for all your help. It is a nice community. I received an offer on CL. But the guy didn't even want to haggle. Wanted to send a check. Seemed sketchy. Seriously I have only ever sold on eBay. I would rather sell to a friend. We tried donating some nice stuff even a guitar, but nobody's taking things these days. Weird. 
So all of your suggestions have been great and I weighed the options. 
And I love all the fun responses! :) I would sell the house with the speakers included! Great ideas! 
There is a sentimental aspect...I remember who I was with what we were doing and what we were listening to. These were kind of my "growing up" speakers.
But you have to let it bail. 
So thanks again for all the options. I appreciate it. Great advice and fun. 

They are not worthless and someone will enjoy them. I have.

Thanks to everyone,

T.

buy an old receiver and set them up in the garage...I did that with my old Advents and Onkyo, and have loved it !!!