as a newie, i would think that buying cams from bigger stores like HN or BEST is better overall, coz they have extended warranty, on top of agent's warranty.
i thought this is the strongest selling point of such big stores. cams warranty are only 1 year and usually they will break down after the one year, and the cost of repairs can be scary....
big stores prices are more ex than street prices, but the extended warranties do justify the price.
actually you can still bargain with big stores... they will give eventually give about 5-8% discounts.