Leo, oftentimes you can get on Craigslist and buy an earlier version, say CS2 - maybe all the way back to the PS series, for a greatly reduced price, then buy an upgrade - but there are a few problems with upgrades if you have to reinstall and don't have the original disks of the earlier version. There was a guy with CS3 at a great price about a month ago. You also have to make sure that what you buy is upgradable to CS4. If it wasn't for the Sony RAW converter, there is not that much diff between CS4 and CS3 to justify anything but an upgrade - nothing groundbreaking. For Nikon owners, CS3 was our Upgrade with the Nikon RAW converter.