I buy from the local independant... prices are all over. I am listing regular retail, but I often can pick up recently expired, or almost expired rolls for half price (they make their cost back...)
$8 / 36 exposure for HP5+
$17 / 36 exposure for Fuji Pro 400H
$19 / 72 exposure of Fuji Superia 400 similar for Kodak Ultramax (that is a 3x24 exposure pack)
$18 / 36 Exposure Kodak Portra 400
$11 / 36 exposure of Kodak Ektar 100
picked up some expired Kodak Royal Gold 400 for $2 each... it was crappy...
its purely recreational for me, and costs me ~$10 a roll to develop (no prints, and I cut and scan my own negs) - so i shoot digital mostly, but like to dabble / play with film to appreciate some of the specialty lenses I have like the 17/4 fish eye which is utterly defished on APS-C format.
When my wife sees the film... I cry out that at least its cheaper than beer drinking with the guys