classifieds/real estate script needed

Hi all,
I need a Classifieds Script similar to URL, but more geared toward a real estate site. This was the only script I could find that has almost all the basic features I need and is easy to customize, but what they want is a little too much for me, since I would also need most of their additional modules it would add up quite a bit, also they want an extra $600 for the source code version. I do like this script though, it has a lot of detail, and if you have something that meets the requirements, perhaps you could give me a better price on it.

But let me briefly give you an idea what I need (this is at the very basic level, the script above has a lot more detail): It will be real estate related and a place for owners to post their listings for a fee per ad, and brokers/agents who can choose from various levels of paid membership to post their listings. Also buyers looking for real estate, can post what they are looking for.

In the event that you do not have a script like this handy, give me some idea of what you would charge to develop something like this and how long it would take.

Please email me at URL