@Hotrod I'm expereincing the same issue and am quite perplexed. I've been in touch with several sellers and can no longer respond to their messages. I simply cannot send messages. There is no offensive language, nor do I try to give personal information. I've had 2 sellers respond to me and I am able to read them...but it will not allow me to answer them back either.
I'd apreciate your help and advice as I really don't want to miss on these offers!! ( - I've reached customer technical support, but no response...)