I do not know how many 17's Pentax manufactured but I've heard from a couple of retailers that they've been told that the entire first production run was effectively sold within days and that a second run has begun.
This certainly demonstrates that the information one poster gave us, which was that Pentax top brass' research predicted the 17 would fail and that they wanted to bury the whole "it's time for film" project ASAP was a lie from the start.
*if* it's 50,000.....that's comparatively a lot of film cameras being sold in a short period of time. I do know a couple of people who have a 17 and really enjoy them. I have not handled one myself but indications are that despite a plasticky feel it's a really well made piece of gear.
Whether this level of sales can be sustained is anyone's guess....but this has begun really well.