Norman Spinrad's Novellette Quarantine has been rejected by the New Yorker, by Asimov's SF Magazine, by Analog, and by others, apparently. And so Norman decided to start an experiement, and sell it in downloadble format(s), for a minimal cover price ($3) from Barnes and Noble and from Amazon.
His reasoning for this, and the reaction of his fans, can be found here on his blog.
I haven't bought & downloaded the story (yet?)... The question asked is valid, though: how much are we willing to part with for our reading matter, all the more so for short fiction? Or are we too used to getting it all for free by now? Answers on a postcard, please...