I keep my logs indefinitely until a computer dies. I'm currently going through my 66MB logfile from ED looking for an offer like that and coming up short. In fact, there is no message to that extent that I can find between April 1 and April 8 (the '750 honor' convo). I think that's around when i get back.
I was on vacation for the earlier part of the conflict, so I'm not really sure what happened in it.