I want to build a specialized directory for members of my occupation, but I want to start free to gain listings, then move to paid at some later date once there are a decent number of listings (I'm also adding other valuable features so it's almost a combo directory and membership site). I prefer to work with Wordpress and I haven't found any theme that lets you go from free to paid at some point in future. Geotheme and Vantage look good, but neither does this. Do you know any directory software/themes that can allow this? Otherwise I can have the theme modified but that will cost some bucks. If not Wordpress, are the others easy enough to modify? I like Wordpress because of the plugins and ease of use.
In phpLD we call this the Claim This Listing mod. It's a pretty popular mod and well supported too http://www.phplinkdirectory.com/forum/showthread.php?t=41140
the buzzler directory theme does that http://sitemile.com/p/buzzler you can make free listings, then turn the site to paid listings at a later date
Vantage DOES do that, you can create multiple payment plans free and paid. You can also populate categories yourself and allow site owners to 'claim the listing' and pay for it.
Buzzler has these features as well plus you can have much more pricing options, like paying for extra images, or bolding the title of the listing in list view, also choose from grid view or list view and many more.