I got 50 rolls of 35mm Sensia 100 slide film 36 exposures expired in 2009. I bought them a year ago and they have been frozen the whole time. I am not entirely sure how they were stored before I got them.
I shot 2 rolls a month ago and they were pretty good. Here are some sample photos.
Urusei Yatsura #2 by Araakii, on Flickr
Guadalajara #19 by Araakii, on Flickr
Comicon 2012 #11 by Araakii, on Flickr
$3.50 per roll + actual shipping.