Are you still having trouble getting a Realtor to take you seriously? As you search for your bargin in the Mission, it would help if you hooked up with an agent to work with.
We've had fun with your questions and all but I'm afraid bargins are pasing you by. Sally has said the sfarmls.com which will give you access to everything on the MLS that is active. If you choose a Realtor you could get set up with a client portal and then you'd be able to track trends etc.
In the question about being taken seriously, Peter Brunton I think posted that he was working with clients in that range. He's a good agent give him a call.