These questions can be easily answered by your agent. By "Honest Advice" do you mean you don't fully trust your agent? I hope that's not the case.
If you are referring to 747 Gates, the house sold for $425K in Dec 2010. Here is a link to the old listing:
Your agent can prepare comps for the current market value and $/sqft of the immediate area. As for the neighborhood location and safety, they are important factors to consider. I recommend visiting the house at different times of the day to see how it would be living there. Also visit crime map websites to get some stats. As an example here are links to Trulia and Crime Reports crime maps for Bernal:
Best of luck,
Paragon Real Estate Group
CA DRE 01844627