I've seen a trend on fleaBay where used backs used to be moving at certain prices are now just sitting there with no bids and often are relisted at lower prices with little effect...
there was an H2 w/ CF-22 demo from Calumet that went for $8300 last week. a few moths back one went for over $11k if I remember correctly.
there was also a Ixpress 132 for $7k that went nowehere - recnelty several of those backs went for
a few $k more, this one has no bids.
granted it's fleaBay and the seller has somethign to do w/ it, but seems to be a trend starting, esp. w/ ZD back on the market too...
IMO wont effect the big gun pricing, but certainly is having an effect on used 16/22mpx backs that are a generation+ or so old...