FWIW, you can always try to retrieve pay-for articles through interlibrary loan via the local library and even the library at your local higher education institutions–they may require that you’re a student, they may not. Smile a lot and it’s likely you’ll get what you’re after. Granted, this may not be successful every time, but it’s always worth a shot if the article in question is that important.
Edit: Danegeld beat me to it:
