also, with a student/teacher discount you can get it much cheaper, so if you aren't a student or teacher, find one. I think all it takes is an active student email.
True. I just got LR4 with my student email even though I've already graduated from school. Not sure if they do it with LR, but you can get PS CS2 I think for free off the Adobe site. Not sure if they have free old versions of LR available yet.