The choices seem to be: Yext, feeds out to about 68 directories. Cost --- as low as $449(?) per year.
Or Manta - Feeds about to 59 Directories for $349 per year.
Now, the problem with these two services is this: You do not "own" the logins to the directories. Yext/Manta just push data over to the directories. So, if you cancel the service, all the corrected data on the directories will most likely revert back, or the duplicates you had removed will come back.
The alternative is Synup, which is a little more labor intensive. Pop your dealership in, Synup finds as many directories as it can, you give Synup the information you want on the directories, and select which ones you want, and they will take care of signing up and entering the data you provided --- at $2 per directory. They will then send you the login information.
I think I'm leaning toward Synup, since I don't want to pay for a service in perpetuity.
