RTA 12C

Hi, I have a pair of these speakers (purchased in 1986) that I'm looking to sell. Any suggestions as to what the best audiophile site might be to post this? Also, I'm looking to establish a value for these speakers. I haven't listened to them in quite some time, and I set them up and had a listen, and wow, do they sound great. Downsizing, so I have to sell...