So far I know of:

Hiragana Times (http://www.hiraganatimes.com) --> PDF
料理通信 The Cuisine Magazine (http://www.r-tsushin.com/) --> PDF and iphone/ipad

Does anyone know of any other Japanese magazines that
sell their issues in electronic form (preferably PDF)?

PDFs are very useful for SRS since you can copy/paste text.
Thanks.

There's sites that post scans of fashion magazines, but I'm not sure about being able to copy/paste