I attended CI's Annual General Meeting in September. As far as I know their prices have never risen, mostly due to extremely low overhead. Their assets are relatively meager compared to Alcor, and they are currently somewhat dependent on charity from members (especially in the form of bequests from patients). They have several responsible people watching over the financials, and they are quite aware of the Alcor's difficulties. I got the sense that the board may be consider a fee hike, which IIRC would not be grandfathered in (according to the terms of their patient contract).
You can dig in to past financial statements here -> http://cryonics.org/financials.html
One of the sticking points for cryonics is how expensive it is. Unfortunately, the estimates on LW (eg. in Normal Cryonics) are likely to be low as they are current costs. This is starting to come to a head for Alcor, with Alcor's low growth rate meaning it faces a rising tide of aging members (hence that emphasis on young cryonicists) and fundamental flaws in its prices; the official word has come down in the latest issue of Cryonics, issue 2011 q4:
Cryopreservation Funding and Inflation: The need for Action; A Discussion Article by the Management and Board of Directors of Alcor
What to do?
Hope the old grandfathered members like Mike Darwin (who predicted this, in the February and March 1988 issues of Cryonics) can afford that.
On a parting note, I read somewhere that CI's low prices have rarely risen. I wonder what their projections look like...