How do you obtain reliable comps?

[George Rodriguez]

Hello everyone. How do you go about obtaining reliable comps for a property? Do you have to use a realtor? I want to go to best source and if that's a realtor than i guess ill go to them but im asking because it always really hard to have a realtor team up with me and give me comps since i haven't done any deals with them it feels like they are not taking me serious. Any tips?