I don't think trulia will e mail you properties as they com on the market ,
I work in the sw area in Miami and can e mail you some listings if you would like me to.
The best way to get the most updated list is to have a realtor do that search for you based on your specific criteria .also you can check another good source, http://www.realtor.com
CRS-Certified Residential Specialist.
GRI- Graduate Realtor Institute.
Your best option is to have a realtor send you listing directly to you from the multiple listing service. You'll quickly receive updated current information when it becomes available. Besides, you can receive emails that are tailor-made based on your search criteria and that should save you lots of time. I'm assuming that you are probably interested in the Doral area. If you wish, I could send you properties that match what you are looking for as close as possible via email, and send you updates when prices come down. By the way, my services are free of charge for you.