Danny has asked repeatedly where the line of geo competency and doing the research for an assignment lies- imo they are two different things. An appraiser has to do research for every new assignment, what that comprises will depend on assignment SOW and knowledge of the appraiser.
Geo competence means the appraiser already knows the area, even if they have not appraised in that particular subdivision; this knowledge gives them context, and they can devote most of their research to other things than getting familiar with the area. Whereas an appraiser new to area will have to spend time learning enough about the area to do a competent job and may lack a context for some of what they learn.
Many buyers are local to a region-, while out of state or region comprise some portion of buyers a portion, typical activity sees many local within region purchasing-people have jobs, family, other connections to an area. Sellers know the area since they own a home there. If a buyer does buy from out of state or region, unless it's an unusual situation, they can devote a good chunk of time getting to know the area, they may make several trips, work with local agents scouting for them etc - more time getting to know an area than an appraiser will for a one off assignment.
Which brings up a question . the market value definition references a well informed or well advised buyer and seller. That includes the area, since location is a driving force for RE selection. Does it make sense for an appraiser to be less well informed about an area than the typically motivated buyer and seller?
How will an appraiser, or client , be able to defend a report when it is pointed out to them by a reviewer, or RE agent, buyer or seller, that the appraiser never worked in the area before, or in case of a desktop, never even went there? If these bifurcated or desktops expand to origination appraisals the questions will come up.