are off market cash offers actually fair, or mostly just convenient?

i keep seeing mixed takes on off market cash deals and i’m trying to get a clearer picture. they definitely seem faster and less stressful, especially for houses that need work, but i also get the concern about giving up some value. i’ve been reading about options like yellowcardproprieties and wondering how people felt about the trade off in real situations. for context, my parents recently bought a new place and mostly just want to unload the old house with minimal hassle. they’re older and not too focused on maximizing price, but i’m still a bit cautious and want to make sure it’s not a bad move.