Studio City and Sherman Oaks are beautiful places. I always enjoyed spending time on Ventura Blvd in that neighborhood. Great restaurants and opportunities to walk/run/bike.
Now your agent is probably trying to be helpful because there are still some overpriced properties out there. He should indeed be doing his homework to help you figure out the right offer. This is usually done through a comparable analysis, that is, a comparison of similar homes in terms of neighborhood and bedrooms, bathrooms, conditions, etc, which have sold in the last 6-12 months.
But in the end remember, it's your call, Rafael. Make sure you are comfortable with whatever offer you make in the end, and do your OWN research on price to develop your OWN opinion, or hire an appraiser (usually $300-$400) to develop an independent price opinion of the property you want. Remember the bank will do so when they figure out if they are going to give you a loan (assuming you are getting a mortgage loan) and you won't get a loan beyond the bank's parameters otherwise.