I haven't gone all the way through with the process but looked into several when buying last.
I think it is a case by case basis. A lot of the time, you tour it just like any other for sale home. You can have the inspections and what not done if you want and you can negotiate if you want, but my realtor told me that they basically just ignore you unless they are unusually motivated(which usually they are not) or if your offer is very close to their ask and that the bank never GAF about what the inspection finds. My realtor went further to tell me that most realtors won't even show them because it is such a long drug out pain in the ass for the money they get.