I think the cheapest version is the Lite one, but that only allows you to recover 25 files per session. I readily admit to getting a hold of my copy of the software by less, shall we say ethical?, means.
(cough cough yeah I would agree)
And I did some workarounds. Apparently one bad sector is the cause of my woes. I'm in the process now of trying to extract my old data (which, thank god, is still there) and then will reformat this poor old drive. I'll let you know how it goes. I'll probably celebrate by watching all the anime I saved from the firey jaws of hard drive death!
EDIT: It worked, it worked! I saved most of my data. Thank you so much for this suggestion -- you saved me assloads of money. May I buy you two gentlemen a drink?