Here is a UNISA graduate working at Wye College in U of L. http://www.wye.ac.uk/AgEcon/staff/lavelled.html
A search at www.google.com will reveal more than a few Unisa graduates working at credible schools. Unisa meets GAAP criteria, and has a solid substantive program. I am acquainted with a guy who is just finishing his Th.D. via Unisa (yes, entirely via DL), who serves on the faculty of a RA and ATS accredited seminary. Russell