I've seen/acquired some nice bikes that have had kickstands on them, but I still agree with those who contend that kickstand equipped bikes should be viewed skeptically.
Very frequently, in my experience if not others, vintage bikes equipped with kickstands have had the kickstand mount tightened down enough to dent or otherwise deform the chainstays at least a little bit. Usually, this is on the bottom, hard to see, and ultimately only a cosmetic issue. But you then can't sell the bike or frame honestly as "frame is dent-free". And any frame dents just kill the value of a frame/bike.
So I'm with those who mentally depreciate a bike with a kickstand - it is either a low end bike or if a high end, high chance of dented frame. In the second case, it still may be worth a look, though...