There are 3 basic approaches to value: cost approach, direct sales comparison and income approach. It is common for a seller to overestimate the value of their property.
Some people can do it themselves, but most really need a partner – someone on their team with their interests at heart.
Multiple Representation means that a brokerage represents more than one client in the same transaction or with respect to the same property. See my blog entries on representation for more information.
When a buyer signs a Buyer Representation agreement they effectively put their broker on the same team in all respects. It summons the highest level of service and gives the broker confidence that they will be supported through the process.
Yes, it is always negotiable.