I only have a few pipes that won't pass a cleaner, but they are really bent pipes, like Oom Paul types. If a straight pipe won't pass a cleaner, I am not sure what to think of that. Does it still produce a good smoke, regardless? Does it seem to make for a juicier smoke... even with a very light touch to your cadence? Those would be the things that would matter more to me.
I don't typically run a pipecleaner through while smoking. I am a flinger. And, I break down my pipes to clean them all at the end of the day, unless I am going out for the day where carrying only one pipe to smoke repeatedly. But, I wouldn't chose to carry a pipe that wouldn't pass a cleaner to smoke with me all day.
We all have our deal killers. No, I don't think it is too much to ask. But, if this is an important issue for a smoker, then you'd better test out the pipe before smoking it. So that you can get your money back.