Jason,
I think most real estate people are now seeing that you need to have really good prints...in order to sell on the internet...one of the reasons I got back into photography...YES I am a realtor...we used to pay anywhere from $75 to $150 for a good set of prints...but I had too much fun...doing it myself....
Get the Widest lens you can...I use a 10-20mm Sigma with a flash and a bouncer on my a700 for most of my shots....the problem with most shots I see people focus on the furniture in the house and not the room....I do think there is a nitch for a good real estate photographer expecially for the larger and higher priced homes...Make sure you find out what the highest resolution the Austin MLS system will take otherwise she will not be able to post your photos....
Lonnie is right...the owners will pay more for it than realtors will however...I don't think your prices are too high....just try not to over proccess the images too much..if they don't look like the house..you might find that she will eventually not call you back due to poor feedback from buyers....my last two cents...don't be afraid to move furniture to make the shot work...I do it all the time...to show better flow in a room....
Here is one of my favorite shots from a house I sold....{Opp's sorry I posted the before picture...here is the edited one...

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Good Luck and feel free to PM or email me...