I hope you aren’t asking for a nicked copy...

Assuming you aren’t: Mac OS X or Windows? There are some pretty good Photoshop alternatives out there which are cheaper.

The GIMP is a UNIX editor which is free, as in Beer.
http://www.gimp.org/

GIMP on a Mac project:
http://gimp.lisanet.de/Website/Overview.html

There is a Windows version. I can’t vouch for it as I have not used it.
http://www.gimp.org/windows/

If you are running a Mac, there is Pixelmator which is fleshing out as a good alternative to Photoshop, and uses a lot of Core Image magic.

http://www.pixelmator.com/

There is, as well, Photoshop Elements which is available for both Mac and Windows platforms and costs a fraction of the entry fee for the full blown version of the app.