Tony, I think that the majority of these recent cases had knives for sale that "had only been used to cut cardboard" or "hardly used", etc, enough anyway to show the minor marks on the blade that an unused one won't have - and IMHO many people are coming around to the fact that any use of a knife, at least in the eyes of a collector, means an indeterminate loss of value if the blade shows any kind of use marks at all - in these cases still not down to the initial sale cost. Result - untouched knives will sell, when used knives will sell for less.
I think it's a combination of both.
The fact that CPK has been able to increase their production volumes, with these recent sales with 40(+) knives in a batch, on a fairly regular basis (i.e. not 40 once a year or something), means buyers on the secondary market can be more discriminating, as you pointed out, when looking for a clean, unblemished item, or expecting a more realistic price for a used item.
Even 6 months back, before these higher volume sales began, and CPKs on the secondary market were still fairly uncommon, it was rare to see them pop up, and they were usually gone in under 5 minutes after they were listed, even at prices significantly over CPK's original pricing.
That's a great thing for CPK, as it means more easily attainable access for newcomers, and potentially, better access on the sales, as the folks who had an inclination to buy 2-4 with the intention of flipping the additional purchases for profit, are now less inclined to do so, when they realize the margins may not be there.
P.S. I'm sure the less common/discontinued models will still command a pretty decent price on the secondary market though.