Carl , I respond to a for sale ad. Most times I do not receive a reply. I put items for sale and reply to the "want" in the classifieds. Out of 13 people I contacted , I received only two replies. I understand there are others selling. I guess I am just venting. No one owes me a reply.
I will continue to buy and sell.
I'm still a bit unclear. You use the term respond but do you email or personal message?
I can't manage them but you're correct a lot of Classified posters simply ignore emails after they've received the one response they needed. Some don't know how to deal with personal messages. Some, yes, to simply register because they believe they will get best price here for what they are selling.