[quote]
1. University of London - Global MBA
2. Robert Gordon, University of Aberdeen
3.Northwestern
2. iMBA - University of Illinois
3. Durham University
4. Bradford.
[/quote]
3 things to consider
1) The accreditations ensure that the quality of a course is on good level. Up to a point
2) For job searching, the reputation the university has in your area is equal, and in my personal opinion, even more important than accreditations, although you will find that good reputation universities also have good accreditations ;)
3) Career services of the school, if you are looking for job opportunities.
your list of universities
University of London, is not accredited and does not appear on any rankings, on anywhere else for that matter
Robert Gordon University is in Aberdeen. Is not University of Aberdeen. Those are two different universities
Northwestern is great great great. But it is not online. And you can't afford it
Durham. Durham has great reputation, has all three accreditations, and decent-ish career services. It is, in my opinion, the clear winner in your list by far. I would choose that if my options were only that list.
Other unis to consider based only on your price range:
With accreditations:
EU: Leicester, Birmingham, Strathclyde.
US: Umass Armherst, Florida State uni, Uni of South Florida
Without accreditations: Heriot Watt EBS is very cheap (like 10000euro)
Cheapest online MBA: Open University Cyprus (is like 6000euro)
All the universities you (and I) mentioned are real and recognised (you have to be aware of that if you look for cheap ones, there are many fakes out there)
TL;DR:
Durham for your price range
Without career services (yet): illinois
Cheap legit option: Heriot Watt