Well I haven't received any PM's or emails concerning the classifieds...
We took away the option of replying to classified ads for a few reasons but mainly because they are not social forums persay (and thus harder to moderate) and any dealings between buyer and seller should be just that. Private. If you are interested in any of the animals or products listed in the classifieds, please contact the seller directly.
I also believe this information could be found in the forums themselves.
If you are trying to post an ad it takes a while to get to the level to be able to post an ad. But you can pm any person who has something listed in the classifieds. Hope this helps.