I got CS3 and CS4 Pro through University of Washington while I was a student there and their deal was a student discount ($300 for each) for a retail version that has no limitations and is usable and upgradable for any purpose for life.
Also, I do plenty of enlargements for sale (16"20" -...
As much as I hate to admit it, I was people watching in Wal-mart yesterday and saw 8x10s for 2$ or 3$ depending on styles. You can also sometimes go to a dollar store and find 1$ framed prints, toss the prints and use the frames.