some did but they were built into convertibles for the dealerships by a company called I think ASC who also did the T tops for them too. you can always tell if it is a ASC drop top as it has a hard cover that the soft top folds under. the ones with the soft top attached to the body like that (the up top pic) is defiantly done aftermarket and will not be nearly as good as the ones sold to dealerships.
this is what a proper 3rd gen drop top looks like as far as how you have to flip up the cover unfold the top etc, I personally would walk away from that one, who knows how bad the shop that did that conversion messed up on it.